12 Days of Christmas
28th
99 Bottles of Beer
16th
307th
24th
Abundant Numbers
103rd
31st
Christmas Trees
333rd
23rd
Cubes
256th
20th
Diamonds
7th
19th
Divisors
491st
26th
Emirp Numbers
213th
22nd
Evil Numbers
16th
410th
34th
Fibonacci
17th
216th
187th
189th
97th
Fizz Buzz
87th
103rd
Happy Numbers
182nd
Happy Numbers (Long)
15th
Kolakoski Constant
26th
Kolakoski Sequence
9th
16th
Leap Years
643rd
Leyland Numbers
141st
24th
Morse Decoder
191st
Niven Numbers
1st
80th
33rd
Odious Numbers
308th
30th
Pangram Grep
216th
Pernicious Numbers
200th
33rd
Prime Numbers
19th
161st
44th
Quine
1st
884th
Recamán
71st
Rule 110
153rd
18th
Smith Numbers
246th
4th
Star Wars Opening Crawl
138th
Sudoku (Fill-in)
16th
Vampire Numbers
111th
17th
Van Eck Sequence
10th
λ
14th
36th
π
25th48th11th86th105th97th23rd38th48th43rd20th49th54th15th28th96th213th106th46th11th78th80th33rd297th75th87th47th14th14th9th
τ
13th
30th
φ
12th
31st
√2
12th
228th
36th
𝑒
17th
159th
43rd