12 Days of Christmas
445
99 Bottles of Beer
509
Abundant Numbers
727
Arabic to Roman
527
277
Arrows
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Christmas Trees
544
CSS Colors
102
Cubes
61
Diamonds
461
Divisors
810
Emirp Numbers
522
Evil Numbers
609
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
861
Odious Numbers
605
Ordinal Numbers
459
Pangram Grep
293
Pascal’s Triangle
489
Pernicious Numbers
383
Prime Numbers
815
336
Quine
9869628634928482994345555413393280687889859871193894558382195367628594559788664181966616749
Recamán
69
Rule 110
Sierpiński Triangle
129
Smith Numbers
47
Tongue-twisters
364
United States
143
Vampire Numbers
103
Van Eck Sequence
23
λ
197
π
100
τ
98
φ
98
√2
96
𝑒
80