12 Days of Christmas
424
99 Bottles of Beer
769
Abundant Numbers
821
Arrows
500
CSS Colors
411
Diamonds
65
Divisors
856
Emirp Numbers
671
Evil Numbers
798
957
Fibonacci
899
934
Fizz Buzz
832
992
976
Happy Numbers
799
892
Leap Years
780
843
846
879
913
821
785
Leyland Numbers
295
Lucky Tickets
269
Morse Decoder
144
Morse Encoder
183
Niven Numbers
976
921
Odious Numbers
796
783
Ordinal Numbers
913
Pangram Grep
Pascal’s Triangle
756
Pernicious Numbers
671
766
Prime Numbers
971
834
Quine
966
861
504
939
554
911
487
602
898
865
940
683
944
533
478
678
448
946
417
857
Rule 110
215
Seven Segment
183
Spelling Numbers
384
United States
λ
500
239
161
490
176
159
172
π
765
τ
744
φ
68
√2
70
𝑒
68