12 Days of Christmas
133rd
Abundant Numbers
105th45th
Abundant Numbers (Long)
63rd
Arabic to Roman
41st
11th
Arithmetic Numbers
42nd
Ascending Primes
3rd
Collatz
128th
253rd
Cubes
242nd
Diamonds
75th
Divisors
109th62nd
Emirp Numbers
46th
16th
Emirp Numbers (Long)
26th
Evil Numbers
150th
109th
Evil Numbers (Long)
81st
32nd
Factorial Factorisation
88th
Farey Sequence
135th
Fizz Buzz
147th215th1,692nd
Kolakoski Sequence
36th
193rd
Leap Years
128th
ln 2
17th15th
4th
N Queens
86th
Niven Numbers
54th
Niven Numbers (Long)
48th41st
Odious Numbers
113th
79th
Odious Numbers (Long)
64th
Prime Numbers
101st55th
Prime Numbers (Long)
65th45th
Van Eck Sequence
22nd
λ
32nd
5th