12 Days of Christmas
380
40499 Bottles of Beer
339
Abundant Numbers
700
Arabic to Roman
447
Arrows
583
Christmas Trees
625
Cubes
391
Diamonds
500
Divisors
857
774Emirp Numbers
466
Emojify
337
Evil Numbers
769
Fibonacci
800
806Fizz Buzz
707
643Fractions
588
1,000Happy Numbers
500
Happy Numbers (Long)
622
Intersection
319
Kolakoski Constant
567Kolakoski Sequence
634
584Leap Years
652
Leyland Numbers
775
Look and Say
552Morse Decoder
152
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
600Recamán
611
Rock-paper-scissors-Spock-lizard
444
Roman to Arabic
443
Seven Segment
407
Sierpiński Triangle
134
Smith Numbers
653Tongue-twisters
645
United States
238
Vampire Numbers
350Van Eck Sequence
494λ
88π
438τ
438φ
729√2
729𝑒
640
629