99 Bottles of Beer
373
Abundant Numbers
546
Christmas Trees
685
Divisors
676
Emirp Numbers
444
Evil Numbers
523
Fibonacci
726
522
497
657
Fizz Buzz
613
Happy Numbers
353
Intersection
557
Kolakoski Sequence
487
Leap Years
572
Look and Say
449
Niven Numbers
593
Odious Numbers
522
Ordinal Numbers
487
Pangram Grep
Pascal’s Triangle
554
Pernicious Numbers
255
Poker
488
Prime Numbers
328
467
493
Recamán
562
Rock-paper-scissors-Spock-lizard
539
Roman to Arabic
484
Seven Segment
277
Tongue-twisters
489
United States
248
Van Eck Sequence
529