12 Days of Christmas
80
99 Bottles of Beer
24
349
Abundant Numbers
527
Arabic to Roman
315
Christmas Trees
545
Collatz
570
Cubes
347
Diamonds
463
Divisors
675
Emirp Numbers
455
Fibonacci
456
Fizz Buzz
465
Foo Fizz Buzz Bar
493
Fractions
346
Happy Numbers
306
Happy Numbers (Long)
386
Kolakoski Sequence
650
Leap Years
705
Leyland Numbers
549
Look and Say
522
Ordinal Numbers
423
Pascal’s Triangle
524
Recamán
634