Abundant Numbers
25th
Collatz
29th427th
Divisors
192nd
Evil Numbers
77th
Evil Numbers (Long)
52nd
Fibonacci
244th
Fizz Buzz
275th
Foo Fizz Buzz Bar
45th
Fractions
57th
Happy Numbers
50th
Happy Numbers (Long)
37th
Intersection
30th
Leap Years
36th
Niven Numbers
111th
Odious Numbers
69th
Odious Numbers (Long)
47th
Pernicious Numbers
71st
Pernicious Numbers (Long)
37th
Prime Numbers
74th
Quine
97th
RecamΓ‘n
17th
Vampire Numbers
37th
Van Eck Sequence
13th
Ο
58th
β2
31st
π
46th