Abundant Numbers
25th
Collatz
30th434th
Divisors
193rd
Evil Numbers
77th
Evil Numbers (Long)
52nd
Fibonacci
244th
Fizz Buzz
278th
Foo Fizz Buzz Bar
45th
Fractions
59th
Happy Numbers
50th
Happy Numbers (Long)
37th
Intersection
30th
Leap Years
36th
Niven Numbers
112th
Odious Numbers
70th
Odious Numbers (Long)
48th
Pernicious Numbers
72nd
Pernicious Numbers (Long)
37th
Prime Numbers
74th
Quine
99th
Recamán
18th
Vampire Numbers
37th
Van Eck Sequence
13th
π
58th
√2
31st
𝑒
47th