12 Days of Christmas
817
99 Bottles of Beer
669
Abundant Numbers
785
Arabic to Roman
544
341
Arrows
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Christmas Trees
550
CSS Colors
189
Cubes
45
Diamonds
468
Divisors
818
Emirp Numbers
659
Evil Numbers
611
Fibonacci
896
Fizz Buzz
745
Fractions
513
Happy Numbers
580
Happy Numbers (Long)
522
Kolakoski Constant
107
Kolakoski Sequence
27
Leap Years
858
Leyland Numbers
117
Look and Say
58
Niven Numbers
876
Odious Numbers
608
Ordinal Numbers
509
Pangram Grep
373
Pascal’s Triangle
492
Pernicious Numbers
394
Prime Numbers
832
337
Quine
978759598625038472994045355313293180487789459771093594258181994967528394459318564081766416648
Recamán
71
Rule 110
Sierpiński Triangle
98
Smith Numbers
47
Tongue-twisters
522
United States
160
Vampire Numbers
105
Van Eck Sequence
23
λ
267
π
100
τ
98
φ
101
√2
100
𝑒
81