12 Days of Christmas
18th
24 Game
8th
99 Bottles of Beer
127th
Arithmetic Numbers
23rd
Arrows
11th
Ascending Primes
12th
ASCII Table
32nd
Catalan Numbers
33rd
Christmas Trees
72nd
Collatz
1st
Cubes
28th
Day of Week
1st
Diamonds
44th
Evil Numbers
61st
Evil Numbers (Long)
34th
Factorial Factorisation
8th
Farey Sequence
16th
Fibonacci
68th
Fizz Buzz
101st
Fractions
14th
Happy Numbers
32nd
Happy Numbers (Long)
16th
Inventory Sequence
18th
Kolakoski Constant
14th
Leap Years
27th
Levenshtein Distance
9th
Leyland Numbers
30th
Niven Numbers
48th
Niven Numbers (Long)
36th
Odious Numbers
62nd
Odious Numbers (Long)
35th
Pascal’s Triangle
104th40th
Pernicious Numbers
40th
Prime Numbers
78th
Prime Numbers (Long)
34th
Quine
1st
Recamán
28th
Rule 110
22nd
Sierpiński Triangle
28th
Smith Numbers
11th
Tongue-twisters
24th
United States
19th
λ
16th
π
24th