12 Days of Christmas
50
Abundant Numbers
601
Catalan’s Constant
121
Collatz
637
Diamonds
359
Divisors
632
Emirp Numbers
468
Evil Numbers
401
Evil Numbers (Long)
397
Fibonacci
687
Fizz Buzz
677
Happy Numbers
459
Hexdump
443
Intersection
526
Leap Years
686
Lucky Numbers
274
Morse Decoder
89
Morse Encoder
179
Number Spiral
267
Odious Numbers
427
Odious Numbers (Long)
400
Pernicious Numbers (Long)
335
Prime Numbers
375
Recamán
465
Reverse Polish Notation
335
Smith Numbers
129