12 Days of Christmas
424
99 Bottles of Beer
769
Abundant Numbers
821
Arrows
501
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
893
Leap Years
780843
846
879913
805
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
Pascalβs Triangle
756
Pernicious Numbers
671
766
Prime Numbers
971
834
Quine
967861491940683555911487602899866940944533478678448946417857
Rule 110
215
Seven Segment
183
Spelling Numbers
385
United States
Ξ»
500
239
161490176159172
Ο
765
Ο
744
Ο
68
β2
70
π
68