12 Days of Christmas
424
99 Bottles of Beer
769
Abundant Numbers
822
Arrows
501
CSS Colors
412
Diamonds
65
Divisors
856
Emirp Numbers
672
Evil Numbers
799
958
Fibonacci
899
935
Fizz Buzz
833
992
977
Happy Numbers
800
893
Leap Years
781844
847
880913
805
785
Leyland Numbers
295
Lucky Tickets
269
Morse Decoder
144
Morse Encoder
183
Niven Numbers
977
921
Odious Numbers
797
784
Ordinal Numbers
914
Pangram Grep
Pascalβs Triangle
756
Pernicious Numbers
671
767
Prime Numbers
971
835
Quine
967862492942684556914488903901866941946535479679448946417857
Rule 110
216
Seven Segment
183
Spelling Numbers
385
United States
Ξ»
501
239
161492176159172
Ο
766
Ο
744
Ο
68
β2
71
π
68