12 Days of Christmas
15th
Abundant Numbers
48th
35th
Arabic to Roman
13th
Divisors
1st
1st
Emirp Numbers
254th
73rd
Evil Numbers
353rd
55th
Fibonacci
157th
7th
Fizz Buzz
53rd
1st
Happy Numbers
155th
24th
Leap Years
193rd
43rd
Look and Say
80th
8th
Niven Numbers
170th
27th
Odious Numbers
261st
45th
Pangram Grep
23rd
Pernicious Numbers
284th
52nd
Prime Numbers
140th
Quine
1st98th57th21st68th
RecamΓ‘n
188th
17th
Roman to Arabic
37th
Ο
25th