Abundant Numbers
4th
brainfuck
15th
Christmas Trees
22nd
Cubes
8th
Emirp Numbers
17th
Evil Numbers
38th
Fibonacci
1st
Fizz Buzz
16th
Intersection
10th
Leap Years
58th
Niven Numbers
48th
Odious Numbers
35th
Ordinal Numbers
29th
Pascalβs Triangle
8th
Pernicious Numbers
28th
Prime Numbers
41st
United States
14th