12 Days of Christmas
478
99 Bottles of Beer
597
Abundant Numbers
675
Arabic to Roman
504
Christmas Trees
533
CSS Colors
48
Cubes
567
Diamonds
628
Divisors
847
Emirp Numbers
313
Evil Numbers
565
Fibonacci
964
Fizz Buzz
861
Happy Numbers
439
Kolakoski Sequence
422
Leap Years
840
Look and Say
511
Niven Numbers
887
Odious Numbers
561
Ordinal Numbers
656
Pangram Grep
627
Pernicious Numbers
567
Prime Numbers
669
Quine
939
Recamán
611
Rule 110
473
Seven Segment
279
Spelling Numbers
541
Tongue-twisters
412
United States
135
Vampire Numbers
104
Van Eck Sequence
614
π
995725745638204
τ
9659
200
φ
87
168
√2
83
204
𝑒
87
161