12 Days of Christmas
32nd
99 Bottles of Beer
33rd
Abundant Numbers
40th
Arabic to Roman
21st
15th
brainfuck
76th
Christmas Trees
52nd
CSS Colors
17th
Cubes
39th
Diamonds
46th
Divisors
85th
Emirp Numbers
28th
Evil Numbers
110th
Fibonacci
128th
Fizz Buzz
272nd
Fractions
58th
Happy Numbers
64th
Happy Numbers (Long)
46th
Kolakoski Constant
20th
Kolakoski Sequence
46th
Leap Years
61st
Leyland Numbers
26th
Look and Say
27th
Niven Numbers
33rd
Odious Numbers
90th
Ordinal Numbers
56th
Pascal’s Triangle
77th
Pernicious Numbers
89th
Prime Numbers
51st
84th
Quine
1st
16th
1st
23rd
49th
56th
23rd
44th
21st
32nd
15th
27th
10th
22nd
1st
247th
1st
1st
1st
16th
21st
1st
38th
41st
51st
11th
69th
1st
27th
43rd
30th
11th
Recamán
50th
Sierpiński Triangle
56th
Smith Numbers
33rd
Tongue-twisters
55th
United States
24th
Vampire Numbers
31st
Van Eck Sequence
45th
λ
35th
π
50th
τ
26th
φ
24th
√2
27th
𝑒
41st