12 Days of Christmas
467
99 Bottles of Beer
509
Abundant Numbers
732
Arabic to Roman
543
279
Arrows
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Christmas Trees
554
CSS Colors
101
Cubes
61
Diamonds
465
Divisors
818
Emirp Numbers
526
Evil Numbers
623
Fibonacci
876
Fizz Buzz
743
Fractions
513
Happy Numbers
428
Happy Numbers (Long)
513
Kolakoski Constant
106
Kolakoski Sequence
26
Leap Years
857
Leyland Numbers
117
Look and Say
58
Niven Numbers
871
Odious Numbers
620
Ordinal Numbers
459
Pangram Grep
298
Pascal’s Triangle
492
Pernicious Numbers
386
Prime Numbers
816
337
Quine
9789588624918462993945355313293080487689359771093494258181894967528394459318564081666416648
Recamán
70
Rule 110
Sierpiński Triangle
132
Smith Numbers
47
Tongue-twisters
363
United States
144
Vampire Numbers
104
Van Eck Sequence
23
λ
197
π
100
τ
98
φ
98
√2
99
𝑒
80