12 Days of Christmas
657
99 Bottles of Beer
606
Abundant Numbers
574
Arabic to Roman
517
Christmas Trees
430
CSS Colors
175
Cubes
191
Diamonds
326
Divisors
667
747
Emirp Numbers
715
Evil Numbers
556
684
Fibonacci
780
Fizz Buzz
536358635
Happy Numbers
726
Leap Years
758
668
Leyland Numbers
110
Morse Decoder
259
Morse Encoder
200
Niven Numbers
584
Odious Numbers
536
656
Ordinal Numbers
233
Pangram Grep
334
Pascal’s Triangle
149
Pernicious Numbers
495
Prime Numbers
574
771
Quine
628
Rock-paper-scissors-Spock-lizard
605
Roman to Arabic
270
Rule 110
10
Seven Segment
333
Sierpiński Triangle
360
Tongue-twisters
717
United States
253
Vampire Numbers
278
λ
527
π
204
τ
201
φ
169
√2
205
𝑒
161