12 Days of Christmas
            
                        
                    552nd55th
        
            99 Bottles of Beer
            
                        
                    
                        
                    45th
        
            Arabic to Roman
            
                        
                    
                        
                    51st
        
            Arrows
            
                        
                    
                        
                    35th
        
            CSS Colors
            
                        
                    
                        
                    35th
        
            Day of Week
            
                        
                    69th
                        
                    
        
            Fizz Buzz
            148th713th3rd
        
            Happy Numbers (Long)
            
                        
                    327th54th
        
            Look and Say
            
                        
                    
                        
                    48th
        
            Lucky Tickets
            
                        
                    143rd26th
        
            Number Spiral
            
                        
                    183rd30th
        
            Pascal’s Triangle
            
                        
                    428th70th
        
            Pernicious Numbers
            
                        
                    
                        
                    85th
        
            Recamán
            
                        
                    
                        
                    45th