12 Days of Christmas
48th
99 Bottles of Beer
46th
Abundant Numbers
53rd
Arrows
40th
CSS Colors
27th
Diamonds
145th
Divisors
78th
Emirp Numbers
16th
Evil Numbers
70th
111th
Fibonacci
157th
155th
Fizz Buzz
198th
1st
182nd
Happy Numbers
17th
37th
Leap Years
149th70th
30th
48th93rd
48th
289th
Leyland Numbers
18th
Lucky Tickets
19th
Morse Decoder
47th
Morse Encoder
42nd
Niven Numbers
1st
119th
Odious Numbers
68th
256th
Ordinal Numbers
64th
Pangram Grep
Pascalβs Triangle
60th
Pernicious Numbers
58th
133rd
Prime Numbers
1st
308th
Quine
1st25th93rd1st76th22nd50th115th25th53rd28th1st1st41st111th44th35th56th41st96th
Rule 110
54th
Seven Segment
78th
Spelling Numbers
18th
United States
Ξ»
43rd
26th
34th42nd38th134th14th
Ο
45th
Ο
46th
Ο
61st
β2
69th
π
70th