12 Days of Christmas
32nd
99 Bottles of Beer
37th
Christmas Trees
33rd
Divisors
60th
Emirp Numbers
56th
Evil Numbers
47th
Fibonacci
136th
Fizz Buzz
139th
Happy Numbers
53rd
Odious Numbers
50th
Pangram Grep
48th
Pascal’s Triangle
46th
Pernicious Numbers
60th
Prime Numbers
82nd
Sierpiński Triangle
30th
π
32nd
φ
21st