12 Days of Christmas
380
24 Game
262
99 Bottles of Beer
414
Abundant Numbers
845
850
766
Catalan Numbers
710
Christmas Trees
607
Collatz
846
CSS Colors
99
Cubes
409
Diamonds
479
Divisors
766
947
987
Emirp Numbers
384
411
514
Emojify
425
Evil Numbers
768
816
Factorial Factorisation
356
Farey Sequence
384
Fibonacci
700
733
947
Fizz Buzz
870
903
898
Gijswijt’s Sequence
284
Happy Numbers
565
Kolakoski Sequence
447
800
728
Leap Years
843
923
Leyland Numbers
838
ln 2
788
Look and Say
652
Lucky Numbers
618
Morse Decoder
263
Morse Encoder
270
N Queens
425
Niven Numbers
652
936
Niven Numbers (Long)
758
Odious Numbers
766
800
Ordinal Numbers
673
Pangram Grep
792
Pascal’s Triangle
862
586
Pernicious Numbers
727
Pernicious Numbers (Long)
750
Prime Numbers
811
660
930
Quine
969
Recamán
606
753
Reverse Polish Notation
872
Seven Segment
514
438
Sierpiński Triangle
632
524
Tongue-twisters
335
Vampire Numbers
106
629
Van Eck Sequence
697
π
78