Abundant Numbers
37th
Abundant Numbers (Long)
41st
Collatz
90th68th
Divisors
160th62nd
Evil Numbers
44th
Evil Numbers (Long)
42nd
Fibonacci
223rd113th
Leap Years
44th570th
Leyland Numbers
9th
Medal Tally
8th
Niven Numbers
115th54th
Niven Numbers (Long)
44th
Odious Numbers
45th
Odious Numbers (Long)
39th
Pascal’s Triangle
Pernicious Numbers
44th
Pernicious Numbers (Long)
26th
Prime Numbers
61st
Prime Numbers (Long)
52nd
Recamán
33rd19th342nd
Reverse Polish Notation
21st