12 Days of Christmas
170
99 Bottles of Beer
22
606
Abundant Numbers
537
Arabic to Roman
432
Christmas Trees
613
Collatz
615
Cubes
454
Diamonds
538
Divisors
698
Emirp Numbers
541
Fibonacci
448
Fizz Buzz
504
Foo Fizz Buzz Bar
609
Fractions
396
Happy Numbers
385
Happy Numbers (Long)
439
Kolakoski Sequence
628
Leap Years
693
Leyland Numbers
623
Look and Say
622
Ordinal Numbers
499
Pascal’s Triangle
481
Recamán
584