12 Days of Christmas
14th
Christmas Trees
15th
Diamonds
19th
Divisors
29th
Emirp Numbers
15th
Evil Numbers
15th
Fibonacci
45th
Fizz Buzz
57th
Happy Numbers
15th
Niven Numbers
34th
Odious Numbers
18th
Pangram Grep
47th
Pascalβs Triangle
28th
Pernicious Numbers
24th
Prime Numbers
26th
Quine
1st
Ο
14th
Ο
12th