12 Days of Christmas
437
99 Bottles of Beer
654
Abundant Numbers
548
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Catalan’s Constant
75
CSS Colors
571
Cubes
66
364
Day of Week
808
Diamonds
65
Divisors
630
Emirp Numbers
598
Emojify
593
Evil Numbers
473
Fibonacci
611
Fizz Buzz
744922270830667570
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
471
Leyland Numbers
75
ln 2
60
Look and Say
680
Morse Decoder
509
Morse Encoder
336
Niven Numbers
567
Odious Numbers
454
Pascal’s Triangle
64
Pernicious Numbers
342
Poker
314
Prime Numbers
564
Prime Numbers (Long)
1767
Quine
967
Recamán
55
Rock-paper-scissors-Spock-lizard
431
ROT13
737
Sierpiński Triangle
504
Smith Numbers
45
Spelling Numbers
374
Tic-tac-toe
569
Tongue-twisters
349
United States
322
Vampire Numbers
86
Van Eck Sequence
16
λ
147
π
639
τ
70
φ
56
√2
59
𝑒
57