12 Days of Christmas
678
Abundant Numbers
595
686
Abundant Numbers (Long)
611
691
Arabic to Roman
344
Arithmetic Numbers
632
684
Billiards
571
Christmas Trees
596
Collatz
684
786
Cubes
352
Diamonds
481
Divisors
645
706
Evil Numbers
616
Evil Numbers (Long)
600
Fibonacci
722911850586784807
Fizz Buzz
532
614
Fractions
669
Happy Numbers
521
Inventory Sequence
520
Leap Years
753717
799
783757
Niven Numbers
577
669
Niven Numbers (Long)
560
651
Number Spiral
403
Odious Numbers
526
615
Odious Numbers (Long)
622
Pascal’s Triangle
536
Pernicious Numbers
367
Prime Numbers
635
Prime Numbers (Long)
594
Quine
441
Roman to Arabic
264
ROT13
345
Seven Segment
329
Sierpiński Triangle
286
Smith Numbers
415
483
Tongue-twisters
509
525
Trinomial Triangle
290
376