12 Days of Christmas
            228th
                        
                    
        
            99 Bottles of Beer
            178th
                        
                    
        
            Abundant Numbers
            339th
                        
                    
        
            Collatz
            
                        
                    38th
        
            Cubes
            69th
                        
                    
        
            Diamonds
            135th
                        
                    
        
            Divisors
            358th
                        
                    
        
            Emirp Numbers
            222nd
                        
                    
        
            Fibonacci
            392nd136th
        
            Fizz Buzz
            665th
                        
                    
        
            Happy Numbers (Long)
            
                        
                    28th
        
            Kolakoski Constant
            59th
                        
                    
        
            Kolakoski Sequence
            96th
                        
                    
        
            Look and Say
            102nd
                        
                    
        
            Morse Encoder
            77th15th
        
            Niven Numbers (Long)
            
                        
                    37th
        
            Pascal’s Triangle
            163rd
                        
                    
        
            Prime Numbers
            428th
                        
                    
        
            Repeating Decimals
            
                        
                    8th
        
            Rock-paper-scissors-Spock-lizard
            81st10th
        
            Sierpiński Triangle
            
                        
                    36th
        
            Tongue-twisters
            183rd23rd
        
            Van Eck Sequence
            71st17th