12 Days of Christmas
28th
Abundant Numbers
32nd
35th
Arabic to Roman
Divisors
1st
4th
Emirp Numbers
164th
79th
Evil Numbers
379th
58th
Fibonacci
173rd
7th
Fizz Buzz
38th
3rd
Happy Numbers
160th
30th
Leap Years
212th
45th
Look and Say
37th
10th
Niven Numbers
185th
28th
Odious Numbers
285th
50th
Pangram Grep
25th
Pernicious Numbers
310th
55th
Prime Numbers
147th
Quine
1st105th67th22nd71st
Recamán
221st
18th
Roman to Arabic
43rd
π
29th