12 Days of Christmas
48th
99 Bottles of Beer
47th
Abundant Numbers
53rd
Arrows
40th
CSS Colors
28th
Diamonds
145th
Divisors
78th
Emirp Numbers
16th
Evil Numbers
70th
112th
Fibonacci
157th
157th
Fizz Buzz
201st
1st
186th
Happy Numbers
17th
37th
Leap Years
150th70th
30th
48th93rd
48th
291st
Leyland Numbers
18th
Lucky Tickets
19th
Morse Decoder
47th
Morse Encoder
42nd
Niven Numbers
1st
120th
Odious Numbers
68th
262nd
Ordinal Numbers
64th
Pangram Grep
Pascalβs Triangle
61st
Pernicious Numbers
58th
136th
Prime Numbers
1st
311th
Quine
1st25th95th1st77th23rd50th115th2nd53rd28th1st1st41st112th44th36th57th41st96th
Rule 110
54th
Seven Segment
78th
Spelling Numbers
18th
United States
Ξ»
43rd
26th
34th42nd38th136th14th
Ο
46th
Ο
46th
Ο
61st
β2
69th
π
70th