12 Days of Christmas
448
99 Bottles of Beer
514
Abundant Numbers
731
Arabic to Roman
532
279
Arrows
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Christmas Trees
553
CSS Colors
101
Cubes
61
Diamonds
464
Divisors
817
Emirp Numbers
525
Evil Numbers
622
Fibonacci
875
Fizz Buzz
742
Fractions
511
Happy Numbers
427
Happy Numbers (Long)
511
Kolakoski Constant
106
Kolakoski Sequence
26
Leap Years
856
Leyland Numbers
122
Look and Say
57
Niven Numbers
869
Odious Numbers
619
Ordinal Numbers
458
Pangram Grep
Pascal’s Triangle
490
Pernicious Numbers
385
Prime Numbers
815
336
Quine
1,000
966
861
492
847
28
456
555
148
927
808
874
602
932
713
940
945
944
582
815
957
678
288
946
602
888
937
818
667
167
57
Recamán
69
Rule 110
Sierpiński Triangle
132
Smith Numbers
47
Tongue-twisters
363
United States
143
Vampire Numbers
104
Van Eck Sequence
23
λ
196
π
100
τ
98
φ
99
√2
100
𝑒
80