12 Days of Christmas
643
99 Bottles of Beer
522
677
Abundant Numbers
759
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Christmas Trees
798
CSS Colors
49
Cubes
392
Diamonds
526
752
664
Divisors
910
Emirp Numbers
720
Emojify
608
Evil Numbers
946
Fibonacci
789
944
Fizz Buzz
964
918
Happy Numbers
514
Intersection
655
660
715
Leyland Numbers
618
Morse Decoder
493
Morse Encoder
451
Ordinal Numbers
845
Pascal’s Triangle
940
Pernicious Numbers
770
821
630
Quine
1,000
Rock-paper-scissors-Spock-lizard
716
Roman to Arabic
452
Rule 110
718
Seven Segment
771
Sierpiński Triangle
776
Spelling Numbers
771
Tongue-twisters
600
555
United States
458
λ
508
π
489
τ
475
φ
688
√2
100
659
990
1,000
252