12 Days of Christmas
437
99 Bottles of Beer
654
Abundant Numbers
549
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Catalan’s Constant
76
CSS Colors
572
Cubes
66
365
Day of Week
810
Diamonds
65
Divisors
631
Emirp Numbers
598
Emojify
594
Evil Numbers
473
Fibonacci
611
Fizz Buzz
744922270830618570
989
Foo Fizz Buzz Bar
13
Happy Numbers
437
Happy Numbers (Long)
145
Kaprekar Numbers
432
Kolakoski Constant
81
Kolakoski Sequence
54
Leap Years
836
Levenshtein Distance
472
Leyland Numbers
75
ln 2
60
Look and Say
681
Morse Decoder
510
Morse Encoder
336
Niven Numbers
567
Odious Numbers
454
Pascal’s Triangle
64
Pernicious Numbers
343
Poker
315
Prime Numbers
564
Prime Numbers (Long)
1767
Quine
967
Recamán
55
Rock-paper-scissors-Spock-lizard
431
ROT13
742
Sierpiński Triangle
504
Smith Numbers
45
Spelling Numbers
375
Tic-tac-toe
572
Tongue-twisters
349
United States
322
Vampire Numbers
86
Van Eck Sequence
16
λ
147
π
640
τ
70
φ
56
√2
59
𝑒
57