99 Bottles of Beer
213
Abundant Numbers
523
Christmas Trees
596
Divisors
640
Emirp Numbers
360
Evil Numbers
523
Fibonacci
726
522
497
657
Fizz Buzz
559
Happy Numbers
274
Intersection
409
Kolakoski Sequence
487
Leap Years
572
Look and Say
366
Niven Numbers
591
Odious Numbers
522
Ordinal Numbers
396
Pangram Grep
Pascal’s Triangle
513
Pernicious Numbers
255
Poker
255
Prime Numbers
328
467
448
Recamán
507
Rock-paper-scissors-Spock-lizard
391
Roman to Arabic
366
Seven Segment
202
Tongue-twisters
276
United States
177
Van Eck Sequence
501