Abundant Numbers
6th
brainfuck
16th
Christmas Trees
22nd
Cubes
5th
Emirp Numbers
18th
Evil Numbers
38th
Fibonacci
1st
Fizz Buzz
17th
Intersection
12th
Leap Years
58th
Niven Numbers
48th
Odious Numbers
36th
Ordinal Numbers
29th
Pascalβs Triangle
9th
Pernicious Numbers
28th
Prime Numbers
41st
United States
14th