12 Days of Christmas
438
99 Bottles of Beer
650
Abundant Numbers
545
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Catalan’s Constant
76
CSS Colors
574
Cubes
66
343
Day of Week
814
Diamonds
64
Divisors
625
Emirp Numbers
594
Emojify
590
Evil Numbers
472
Fibonacci
608
Fizz Buzz
736916271828616565
986
Foo Fizz Buzz Bar
13
Happy Numbers
434
Happy Numbers (Long)
143
Kaprekar Numbers
404
Kolakoski Constant
80
Kolakoski Sequence
54
Leap Years
813
Levenshtein Distance
468
Leyland Numbers
74
ln 2
59
Look and Say
673
Morse Decoder
504
Morse Encoder
330
Niven Numbers
562
Odious Numbers
451
Pascal’s Triangle
64
Pernicious Numbers
339
Poker
307
Prime Numbers
563
Prime Numbers (Long)
1167
Quine
962
Recamán
54
Rock-paper-scissors-Spock-lizard
431
ROT13
736
Sierpiński Triangle
494
Smith Numbers
44
Spelling Numbers
372
Tic-tac-toe
564
Tongue-twisters
349
United States
322
Vampire Numbers
83
Van Eck Sequence
16
λ
137
π
638
τ
70
φ
56
√2
58
𝑒
56