12 Days of Christmas
789
99 Bottles of Beer
644
Abundant Numbers
680
Christmas Trees
639
Diamonds
604
Divisors
905
Emirp Numbers
531
Fibonacci
735
Fizz Buzz
707
Fractions
367
Intersection
600
Kolakoski Sequence
452
Leap Years
662
Niven Numbers
846
Niven Numbers (Long)
806
Number Spiral
206
Ordinal Numbers
681
Pangram Grep
Pernicious Numbers
494
Prime Numbers
580
Quine
969
Recamán
670
Van Eck Sequence
371
π
64