12 Days of Christmas
445
99 Bottles of Beer
503
Abundant Numbers
727
Arabic to Roman
526
275
Arrows
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Christmas Trees
543
CSS Colors
102
Cubes
61
Diamonds
449
Divisors
810
Emirp Numbers
522
Evil Numbers
610
Fibonacci
873
Fizz Buzz
741
Fractions
514
Happy Numbers
423
Happy Numbers (Long)
507
Kolakoski Constant
105
Kolakoski Sequence
26
Leap Years
838
Leyland Numbers
115
Look and Say
57
Niven Numbers
862
Odious Numbers
605
Ordinal Numbers
457
Pangram Grep
293
Pascal’s Triangle
489
Pernicious Numbers
383
Prime Numbers
816
336
Quine
9869628644928482994345555413393280687889859871293894558382195367628694559788664281966616749
Recamán
69
Rule 110
Sierpiński Triangle
134
Smith Numbers
47
Tongue-twisters
364
United States
143
Vampire Numbers
102
Van Eck Sequence
23
λ
197
π
100
τ
98
φ
98
√2
96
𝑒
80