12 Days of Christmas
16th
Abundant Numbers
50th
35th
Arabic to Roman
13th
Divisors
1st
1st
Emirp Numbers
260th
73rd
Evil Numbers
357th
55th
Fibonacci
160th
7th
Fizz Buzz
53rd
1st
Happy Numbers
158th
24th
Leap Years
197th
43rd
Look and Say
84th
8th
Niven Numbers
171st
27th
Odious Numbers
265th
47th
Pangram Grep
23rd
Pernicious Numbers
291st
52nd
Prime Numbers
141st
Quine
1st101st59th21st71st
RecamΓ‘n
193rd
17th
Roman to Arabic
37th
Ο
26th