12 Days of Christmas
32nd
99 Bottles of Beer
37th
Christmas Trees
32nd
Divisors
58th
Emirp Numbers
55th
Evil Numbers
47th
Fibonacci
115th
Fizz Buzz
136th
Happy Numbers
52nd
Odious Numbers
49th
Pangram Grep
45th
Pascal’s Triangle
45th
Pernicious Numbers
57th
Prime Numbers
80th
Sierpiński Triangle
30th
π
32nd
φ
21st