12 Days of Christmas
136th
Abundant Numbers
106th45th
Abundant Numbers (Long)
64th
Arabic to Roman
41st
12th
Arithmetic Numbers
45th
Ascending Primes
3rd
Collatz
129th
65th
Cubes
260th
Diamonds
75th
Divisors
111th65th
Emirp Numbers
48th
16th
Emirp Numbers (Long)
28th
Evil Numbers
154th
112th
Evil Numbers (Long)
84th
32nd
Factorial Factorisation
103rd
Farey Sequence
143rd
Fizz Buzz
150th220th1,740th
Kolakoski Sequence
37th
205th
Leap Years
134th
ln 2
17th18th
4th
N Queens
94th
Niven Numbers
58th
Niven Numbers (Long)
50th43rd
Odious Numbers
116th
82nd
Odious Numbers (Long)
67th
Prime Numbers
106th56th
Prime Numbers (Long)
71st45th
Van Eck Sequence
22nd
λ
33rd
5th