12 Days of Christmas
842
99 Bottles of Beer
722
Abundant Numbers
Arabic to Roman
538
Christmas Trees
561
CSS Colors
51
Cubes
Diamonds
669
Divisors
888
Emirp Numbers
Evil Numbers
607
Fibonacci
1,000
Fizz Buzz
952
Happy Numbers
Kolakoski Sequence
475
Leap Years
908
Look and Say
552
Niven Numbers
968
Odious Numbers
618
Ordinal Numbers
702
Pangram Grep
673
Pernicious Numbers
604
Prime Numbers
827
Quine
1,000
RecamΓ‘n
657
Rule 110
508
Seven Segment
316
Spelling Numbers
671
Tongue-twisters
693
United States
193
Vampire Numbers
115
Van Eck Sequence
669
Ο
1075925946447223
Ο
10661
224
Ο
96
188
β2
89
227
π
94
177