12 Days of Christmas
142nd
Abundant Numbers
108th46th
Abundant Numbers (Long)
65th
Arabic to Roman
41st
12th
Arithmetic Numbers
46th
Ascending Primes
3rd
Collatz
137th
295th
Cubes
259th
Diamonds
78th
Divisors
113th67th
Emirp Numbers
48th
16th
Emirp Numbers (Long)
29th
Evil Numbers
156th
121st
Evil Numbers (Long)
86th
33rd
Factorial Factorisation
112th
Farey Sequence
158th
Fizz Buzz
154th222nd1,764th
Kolakoski Sequence
38th
209th
Leap Years
136th
ln 2
17th15th
4th
N Queens
100th
Niven Numbers
60th
Niven Numbers (Long)
51st46th
Odious Numbers
118th
85th
Odious Numbers (Long)
70th
Prime Numbers
108th57th
Prime Numbers (Long)
72nd44th
Van Eck Sequence
22nd
λ
32nd
5th
π
34th