12 Days of Christmas
380
404
99 Bottles of Beer
339
Abundant Numbers
700
Arabic to Roman
447
Arrows
583
Christmas Trees
614
Cubes
387
Diamonds
500
Divisors
857
774
Emirp Numbers
466
Emojify
337
Evil Numbers
769
Fibonacci
800
806
Fizz Buzz
707
643
Fractions
544
1,000
Happy Numbers
500
Happy Numbers (Long)
622
Intersection
319
Kolakoski Constant
567
Kolakoski Sequence
634
584
Leap Years
652
Leyland Numbers
775
Look and Say
552
Morse Decoder
148
Morse Encoder
164
Niven Numbers
688
Odious Numbers
800
Ordinal Numbers
579
Pangram Grep
709
Pascal’s Triangle
676
Pernicious Numbers
339
Prime Numbers
656
600
Recamán
611
Rock-paper-scissors-Spock-lizard
444
Roman to Arabic
443
Seven Segment
407
Sierpiński Triangle
134
Smith Numbers
653
Tongue-twisters
645
United States
246
Vampire Numbers
350
Van Eck Sequence
494
λ
88
π
438
τ
438
φ
729
√2
729
𝑒
640
629