12 Days of Christmas
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    375
        
            99 Bottles of Beer
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    391
        
            Abundant Numbers
            
                        
                    
                        
                    
                        
                    563
                        
                    645
        
            Arabic to Roman
            
                        
                    
                        
                    
                        
                    503
                        
                    356
        
            Arithmetic Numbers
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    674
        
            Arrows
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    574
        
            Christmas Trees
            
                        
                    
                        
                    
                        
                    540
                        
                    621
        
            Diamonds
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    431
        
            Divisors
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    871
        
            Evil Numbers
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    741
        
            Evil Numbers (Long)
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    732
        
            Fibonacci
            
                        
                    
                        
                    918594
                        
                    947
        
            Fizz Buzz
            763746
                        
                    690718869
        
            Foo Fizz Buzz Bar
            
                        
                    
                        
                    
                        
                    739
                        
                    742
        
            Forsyth–Edwards Notation
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    475
        
            Fractions
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    456
        
            Intersection
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    395
        
            Kolakoski Sequence
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    718
        
            Leap Years
            
                        
                    
                        
                    
                        
                    583
                        
                    782
        
            Leyland Numbers
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    620
        
            Niven Numbers
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    846
        
            Niven Numbers (Long)
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    820
        
            Odious Numbers
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    755
        
            Odious Numbers (Long)
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    745
        
            Ordinal Numbers
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    600
        
            Pascal’s Triangle
            
                        
                    
                        
                    
                        
                    535
                        
                    667
        
            Quine
            
                        
                    
                        
                    
                        
                    481
                        
                    969
        
            Recamán
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    573
        
            Seven Segment
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    405
        
            Time Distance
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    374
        
            Tongue-twisters
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    351
        
            Van Eck Sequence
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    631
        
            π
            
                        
                    
                        
                    
                        
                    
                        
                    
                        
                    302