12 Days of Christmas
478
99 Bottles of Beer
598
Abundant Numbers
670
Arabic to Roman
503
Christmas Trees
529
CSS Colors
48
Cubes
565
Diamonds
621
Divisors
838
Emirp Numbers
309
Evil Numbers
563
Fibonacci
961
Fizz Buzz
858
Happy Numbers
434
Kolakoski Sequence
420
Leap Years
808
Look and Say
506
Niven Numbers
878
Odious Numbers
558
Ordinal Numbers
655
Pangram Grep
620
Pernicious Numbers
564
Prime Numbers
668
Quine
941
Recamán
605
Rule 110
463
Seven Segment
276
Spelling Numbers
544
Tongue-twisters
411
United States
135
Vampire Numbers
103
Van Eck Sequence
611
π
985724745637203
τ
9558
200
φ
87
168
√2
82
203
𝑒
86
160