12 Days of Christmas
827
24 Game
421
99 Bottles of Beer
723
Abundant Numbers
845
857
797
Catalan Numbers
710
Christmas Trees
697
Collatz
846
CSS Colors
228
Cubes
584
Diamonds
573
Divisors
766
1,000
987
Emirp Numbers
489
468
636
Emojify
425
Evil Numbers
776
816
Factorial Factorisation
450
Farey Sequence
437
Fibonacci
700
733
947
Fizz Buzz
870
903
983
Gijswijt’s Sequence
347
Happy Numbers
729
Kolakoski Sequence
455
800
728
Leap Years
843
923
Leyland Numbers
986
ln 2
803
Look and Say
804
Lucky Numbers
618
Morse Decoder
382
Morse Encoder
389
N Queens
569
Niven Numbers
652
936
Niven Numbers (Long)
758
Odious Numbers
766
800
Ordinal Numbers
827
Pangram Grep
935
Pascal’s Triangle
931
586
Pernicious Numbers
727
Pernicious Numbers (Long)
765
Prime Numbers
811
686
930
Quine
969
Recamán
606
836
Reverse Polish Notation
872
Seven Segment
539
600
Sierpiński Triangle
636
562
Tongue-twisters
594
Vampire Numbers
106
855
Van Eck Sequence
737
π
94