12 Days of Christmas
17th
Christmas Trees
16th
Diamonds
19th
Divisors
16th
Emirp Numbers
17th
Evil Numbers
13th
Fibonacci
22nd
Fizz Buzz
18th
Happy Numbers
15th
Niven Numbers
25th
Odious Numbers
14th
Pangram Grep
49th
Pascalβs Triangle
20th
Pernicious Numbers
24th
Prime Numbers
17th
Quine
1st
Ο
13th
Ο
10th