12 Days of Christmas
325th
99 Bottles of Beer
161st
Abundant Numbers
53rd
Arrows
44th
CSS Colors
51st
Diamonds
145th
Divisors
78th
Emirp Numbers
42nd
Evil Numbers
70th
112th
Fibonacci
157th
157th
Fizz Buzz
201st
1st
53rd
Happy Numbers
43rd
46th
Leap Years
149th66th
28th
46th93rd
48th
285th
Leyland Numbers
98th
Lucky Tickets
43rd
Morse Decoder
76th
Morse Encoder
88th
Niven Numbers
1st
120th
Odious Numbers
68th
261st
Ordinal Numbers
64th
Pangram Grep
Pascalβs Triangle
60th
Pernicious Numbers
58th
135th
Prime Numbers
1st
311th
Quine
1st25th95th1st77th23rd50th115th2nd53rd28th1st1st41st112th44th36th57th39th96th
Rule 110
88th
Seven Segment
132nd
Spelling Numbers
83rd
United States
Ξ»
43rd
54th
34th42nd37th126th14th
Ο
46th
Ο
46th
Ο
62nd
β2
70th
π
70th