12 Days of Christmas
            
                        
                    221
                        
                    
        
            99 Bottles of Beer
            
                        
                    203307
        
            Abundant Numbers
            247842325
        
            Arabic to Roman
            
                        
                    
                        
                    169
        
            Christmas Trees
            
                        
                    111107
        
            Cubes
            
                        
                    117
                        
                    
        
            Diamonds
            
                        
                    97105
        
            Divisors
            575817412
        
            Emirp Numbers
            10781197
        
            Evil Numbers
            
                        
                    179487
        
            Fibonacci
            45512397
        
            Fizz Buzz
            
                        
                    757153
        
            Happy Numbers
            150137139
        
            Leap Years
            200199275
        
            Morse Decoder
            
                        
                    91
                        
                    
        
            Morse Encoder
            
                        
                    105
                        
                    
        
            Niven Numbers
            196202268
        
            Odious Numbers
            130180257
        
            Ordinal Numbers
            
                        
                    16885
        
            Pangram Grep
            
                        
                    206
                        
                    
        
            Pascal’s Triangle
            
                        
                    7599
        
            Pernicious Numbers
            
                        
                    6992
        
            Prime Numbers
            161101204
        
            Quine
            
                        
                    543
                        
                    
        
            Rock-paper-scissors-Spock-lizard
            
                        
                    267
                        
                    
        
            Roman to Arabic
            
                        
                    192
                        
                    
        
            Rule 110
            
                        
                    
                        
                    88
        
            Seven Segment
            
                        
                    218167
        
            Sierpiński Triangle
            
                        
                    72