12 Days of Christmas
437
99 Bottles of Beer
654
Abundant Numbers
549
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Catalan’s Constant
76
CSS Colors
574
Cubes
66
365
Day of Week
812
Diamonds
65
Divisors
631
Emirp Numbers
599
Emojify
594
Evil Numbers
473
Fibonacci
611
Fizz Buzz
744922271830618571
989
Foo Fizz Buzz Bar
13
Happy Numbers
437
Happy Numbers (Long)
145
Kaprekar Numbers
426
Kolakoski Constant
81
Kolakoski Sequence
54
Leap Years
837
Levenshtein Distance
473
Leyland Numbers
75
ln 2
60
Look and Say
681
Morse Decoder
506
Morse Encoder
336
Niven Numbers
568
Odious Numbers
454
Pascal’s Triangle
64
Pernicious Numbers
343
Poker
315
Prime Numbers
564
Prime Numbers (Long)
1167
Quine
959
Recamán
55
Rock-paper-scissors-Spock-lizard
431
ROT13
738
Sierpiński Triangle
504
Smith Numbers
45
Spelling Numbers
375
Tic-tac-toe
568
Tongue-twisters
350
United States
323
Vampire Numbers
86
Van Eck Sequence
16
λ
147
π
640
τ
70
φ
56
√2
59
𝑒
57