12 Days of Christmas
827
99 Bottles of Beer
922
Abundant Numbers
551
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Catalan’s Constant
77
CSS Colors
618
Cubes
51
454
Day of Week
813
Diamonds
65
Divisors
631
Emirp Numbers
665
Emojify
547
Evil Numbers
473
Fibonacci
611
Fizz Buzz
752929272833620577
992
Foo Fizz Buzz Bar
14
Happy Numbers
531
Happy Numbers (Long)
145
Kaprekar Numbers
420
Kolakoski Constant
82
Kolakoski Sequence
54
Leap Years
818
Levenshtein Distance
540
Leyland Numbers
75
ln 2
60
Look and Say
682
Morse Decoder
627
Morse Encoder
411
Niven Numbers
570
Odious Numbers
454
Pascal’s Triangle
64
Pernicious Numbers
343
Poker
373
Prime Numbers
564
Prime Numbers (Long)
1167
Quine
968
Recamán
55
Rock-paper-scissors-Spock-lizard
484
ROT13
780
Sierpiński Triangle
515
Smith Numbers
45
Spelling Numbers
608
Tic-tac-toe
575
Tongue-twisters
525
United States
352
Vampire Numbers
96
Van Eck Sequence
16
λ
200
π
640
τ
70
φ
57
√2
59
𝑒
57