12 Days of Christmas
817
99 Bottles of Beer
693
Abundant Numbers
784
Arabic to Roman
542
341
Arrows
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Christmas Trees
556
CSS Colors
188
Cubes
45
Diamonds
467
Divisors
817
Emirp Numbers
658
Evil Numbers
634
Fibonacci
894
Fizz Buzz
745
Fractions
511
Happy Numbers
579
Happy Numbers (Long)
520
Kolakoski Constant
106
Kolakoski Sequence
27
Leap Years
857
Leyland Numbers
123
Look and Say
57
Niven Numbers
874
Odious Numbers
631
Ordinal Numbers
508
Pangram Grep
Pascal’s Triangle
490
Pernicious Numbers
393
Prime Numbers
831
336
Quine
1,000
75
966
861
517
847
28
456
554
148
927
808
874
602
932
713
940
945
944
582
815
957
678
288
946
602
888
937
818
667
167
57
Recamán
71
Rule 110
Sierpiński Triangle
98
Smith Numbers
48
Tongue-twisters
522
United States
170
Vampire Numbers
105
Van Eck Sequence
23
λ
267
π
100
τ
98
φ
102
√2
101
𝑒
81