12 Days of Christmas
242
Abundant Numbers
562
Catalan’s Constant
121
Collatz
627
Diamonds
359
Divisors
632
Emirp Numbers
373
Evil Numbers
401
Evil Numbers (Long)
389
Fibonacci
672
Fizz Buzz
677
Happy Numbers
338
Hexdump
444
Intersection
542
Leap Years
673
Lucky Numbers
270
Morse Decoder
88
Morse Encoder
204
Number Spiral
267
Odious Numbers
427
Odious Numbers (Long)
400
Pernicious Numbers (Long)
328
Prime Numbers
368
Recamán
457
Reverse Polish Notation
335
Smith Numbers
128