12 Days of Christmas
141st
Abundant Numbers
107th45th
Abundant Numbers (Long)
65th
Arabic to Roman
41st
12th
Arithmetic Numbers
45th
Ascending Primes
3rd
Collatz
136th
283rd
Cubes
255th
Diamonds
78th
Divisors
112th66th
Emirp Numbers
48th
16th
Emirp Numbers (Long)
28th
Evil Numbers
155th
118th
Evil Numbers (Long)
86th
33rd
Factorial Factorisation
104th
Farey Sequence
152nd
Fizz Buzz
152nd222nd1,743rd
Kolakoski Sequence
37th
206th
Leap Years
135th
ln 2
17th15th
4th
N Queens
96th
Niven Numbers
58th
Niven Numbers (Long)
51st44th
Odious Numbers
117th
83rd
Odious Numbers (Long)
68th
Prime Numbers
107th55th
Prime Numbers (Long)
71st44th
Van Eck Sequence
22nd
λ
32nd
5th
π
34th