12 Days of Christmas
173
99 Bottles of Beer
22
606
Abundant Numbers
540
Arabic to Roman
431
Christmas Trees
616
Collatz
665
Cubes
470
Diamonds
543
Divisors
701
Emirp Numbers
550
Fibonacci
449
Fizz Buzz
505
Foo Fizz Buzz Bar
611
Fractions
395
Happy Numbers
387
Happy Numbers (Long)
442
Kolakoski Sequence
626
Leap Years
694
Leyland Numbers
627
Look and Say
625
Ordinal Numbers
505
Pascal’s Triangle
481
Recamán
589