12 Days of Christmas
48th
99 Bottles of Beer
47th
Abundant Numbers
54th
Arrows
40th
CSS Colors
28th
Diamonds
145th
Divisors
79th
Emirp Numbers
16th
Evil Numbers
70th
112th
Fibonacci
157th
158th
Fizz Buzz
201st
1st
186th
Happy Numbers
17th
38th
Leap Years
152nd70th
30th
48th93rd
48th
293rd
Leyland Numbers
19th
Lucky Tickets
19th
Morse Decoder
47th
Morse Encoder
42nd
Niven Numbers
1st
122nd
Odious Numbers
68th
263rd
Ordinal Numbers
64th
Pangram Grep
Pascalβs Triangle
61st
Pernicious Numbers
58th
139th
Prime Numbers
1st
314th
Quine
1st25th97th1st77th24th50th115th2nd53rd29th1st1st41st114th45th36th58th41st97th
Rule 110
54th
Seven Segment
78th
Spelling Numbers
18th
United States
Ξ»
43rd
26th
34th42nd38th137th14th
Ο
46th
Ο
46th
Ο
61st
β2
70th
π
71st