12 Days of Christmas
54
99 Bottles of Beer
504
Abundant Numbers
727
Arabic to Roman
527
275
Arrows
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Christmas Trees
544
CSS Colors
102
Cubes
61
Diamonds
433
Divisors
810
Emirp Numbers
522
Evil Numbers
610
Fibonacci
874
Fizz Buzz
741
Fractions
514
Happy Numbers
424
Happy Numbers (Long)
507
Kolakoski Constant
105
Kolakoski Sequence
26
Leap Years
839
Leyland Numbers
116
Look and Say
57
Niven Numbers
862
Odious Numbers
593
Ordinal Numbers
458
Pangram Grep
293
Pascal’s Triangle
489
Pernicious Numbers
383
Prime Numbers
816
336
Quine
98696286449284929943455555133933807879932598712938945583821953677286945495886642821666167116
Recamán
69
Rule 110
Sierpiński Triangle
134
Smith Numbers
46
Tongue-twisters
362
United States
143
Vampire Numbers
102
Van Eck Sequence
23
λ
196
π
100
τ
98
φ
98
√2
96
𝑒
80