99 Bottles of Beer
375
Abundant Numbers
554
Christmas Trees
697
Divisors
687
Emirp Numbers
453
Evil Numbers
533
Fibonacci
758
532
515
667
Fizz Buzz
617
Happy Numbers
360
Intersection
578
Kolakoski Sequence
505
Leap Years
581
Look and Say
463
Niven Numbers
603
Odious Numbers
533
Ordinal Numbers
500
Pangram Grep
Pascal’s Triangle
568
Pernicious Numbers
261
Poker
501
Prime Numbers
346
476
512
Recamán
575
Rock-paper-scissors-Spock-lizard
547
Roman to Arabic
500
Seven Segment
284
Tongue-twisters
493
United States
254
Van Eck Sequence
549