12 Days of Christmas
821
832
99 Bottles of Beer
588
Abundant Numbers
717
Arabic to Roman
610
Arrows
478
Christmas Trees
693
Cubes
545
Diamonds
586
Divisors
890
801
Emirp Numbers
564
Emojify
351
Evil Numbers
755
Fibonacci
789
786
Fizz Buzz
768
705
Fractions
620
990
Happy Numbers
632
Happy Numbers (Long)
712
Intersection
420
Kolakoski Constant
630
Kolakoski Sequence
611
547
Leap Years
642
Leyland Numbers
886
Look and Say
528
Morse Decoder
114
Morse Encoder
125
Niven Numbers
676
Odious Numbers
783
Ordinal Numbers
692
Pangram Grep
814
Pascal’s Triangle
711
Pernicious Numbers
331
Prime Numbers
643
661
Recamán
662
Rock-paper-scissors-Spock-lizard
591
Roman to Arabic
568
Seven Segment
544
Sierpiński Triangle
102
Smith Numbers
763
Tongue-twisters
657
United States
338
Vampire Numbers
442
Van Eck Sequence
464
λ
148
π
425
τ
423
φ
708
√2
711
𝑒
625
609