12 Days of Christmas
828
99 Bottles of Beer
918
Abundant Numbers
545
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Catalan’s Constant
76
CSS Colors
618
Cubes
51
411
Day of Week
813
Diamonds
64
Divisors
625
Emirp Numbers
661
Emojify
545
Evil Numbers
472
Fibonacci
608
Fizz Buzz
739918271829617566
987
Foo Fizz Buzz Bar
13
Happy Numbers
526
Happy Numbers (Long)
143
Kaprekar Numbers
404
Kolakoski Constant
80
Kolakoski Sequence
54
Leap Years
813
Levenshtein Distance
538
Leyland Numbers
74
ln 2
59
Look and Say
672
Morse Decoder
622
Morse Encoder
405
Niven Numbers
562
Odious Numbers
451
Pascal’s Triangle
64
Pernicious Numbers
339
Poker
369
Prime Numbers
563
Prime Numbers (Long)
1167
Quine
962
Recamán
54
Rock-paper-scissors-Spock-lizard
478
ROT13
777
Sierpiński Triangle
505
Smith Numbers
45
Spelling Numbers
598
Tic-tac-toe
564
Tongue-twisters
523
United States
349
Vampire Numbers
94
Van Eck Sequence
16
λ
186
π
638
τ
70
φ
56
√2
58
𝑒
56