12 Days of Christmas
48th
99 Bottles of Beer
46th
Abundant Numbers
53rd
Arrows
38th
CSS Colors
27th
Diamonds
144th
Divisors
78th
Emirp Numbers
16th
Evil Numbers
70th
109th
Fibonacci
156th
153rd
Fizz Buzz
197th
1st
181st
Happy Numbers
17th
37th
Leap Years
147th69th
30th
48th93rd
48th
286th
Leyland Numbers
18th
Lucky Tickets
19th
Morse Decoder
46th
Morse Encoder
40th
Niven Numbers
1st
117th
Odious Numbers
68th
250th
Ordinal Numbers
63rd
Pangram Grep
Pascalβs Triangle
60th
Pernicious Numbers
58th
133rd
Prime Numbers
1st
304th
Quine
1st25th90th1st74th22nd50th114th25th51st28th1st1st41st110th43rd35th56th41st95th
Rule 110
54th
Seven Segment
78th
Spelling Numbers
18th
United States
Ξ»
42nd
26th
33rd42nd38th131st14th
Ο
45th
Ο
45th
Ο
61st
β2
69th
π
70th