12 Days of Christmas
827
99 Bottles of Beer
923
Abundant Numbers
551
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Catalan’s Constant
77
CSS Colors
615
Cubes
51
454
Day of Week
808
Diamonds
65
Divisors
631
Emirp Numbers
664
Emojify
545
Evil Numbers
473
Fibonacci
611
Fizz Buzz
751929271833669577
992
Foo Fizz Buzz Bar
14
Happy Numbers
530
Happy Numbers (Long)
145
Kaprekar Numbers
432
Kolakoski Constant
81
Kolakoski Sequence
54
Leap Years
837
Levenshtein Distance
539
Leyland Numbers
75
ln 2
60
Look and Say
680
Morse Decoder
626
Morse Encoder
410
Niven Numbers
570
Odious Numbers
454
Pascal’s Triangle
64
Pernicious Numbers
342
Poker
372
Prime Numbers
564
Prime Numbers (Long)
1767
Quine
967
Recamán
55
Rock-paper-scissors-Spock-lizard
484
ROT13
778
Sierpiński Triangle
514
Smith Numbers
45
Spelling Numbers
607
Tic-tac-toe
571
Tongue-twisters
528
United States
355
Vampire Numbers
95
Van Eck Sequence
16
λ
200
π
639
τ
70
φ
57
√2
59
𝑒
57