99 Bottles of Beer
215
Abundant Numbers
533
Christmas Trees
607
Divisors
651
Emirp Numbers
367
Evil Numbers
533
Fibonacci
758
532
515
667
Fizz Buzz
564
Happy Numbers
279
Intersection
422
Kolakoski Sequence
505
Leap Years
581
Look and Say
375
Niven Numbers
603
Odious Numbers
533
Ordinal Numbers
407
Pangram Grep
Pascal’s Triangle
526
Pernicious Numbers
261
Poker
260
Prime Numbers
346
476
463
Recamán
519
Rock-paper-scissors-Spock-lizard
397
Roman to Arabic
378
Seven Segment
207
Tongue-twisters
278
United States
181
Van Eck Sequence
520