12 Days of Christmas
11th
308th
25th
33rd
53rd
771st
11th
11th
99 Bottles of Beer
7th
13th
420th
24th
17th
35th
61st
851st
8th
11th
Abundant Numbers
21st
18th
282nd
48th
36th
894th
16th
13th
17th
11th
Abundant Numbers (Long)
8th
Arithmetic Numbers
6th
Ascending Primes
9th
9th
2nd
7th
2nd
7th
7th
3rd
7th
3rd
4th
4th
7th
Catalan Numbers
5th
Catalan’s Constant
4th
3rd
3rd
4th
4th
Christmas Trees
248th
23rd
36th
54th
668th
11th
8th
Collatz
6th
Cubes
4th
4th
85th
14th
13th
4th
6th
Diamonds
33rd
127th
23rd
18th
29th
446th
63rd
9th
9th
8th
Divisors
47th
61st
20th
12th
Emirp Numbers
151st
22nd
28th
530th
8th
5th
Evil Numbers
297th
37th
993rd
15th
10th
Fibonacci
78th
58th
1,705th
55th
31st
Fizz Buzz
74th
76th
450th
49th
1,281st
113th
8th
137th
260th
152nd
40th
294th
136th
59th
35th
Happy Numbers
47th
142nd
23rd
543rd
10th
5th
Inventory Sequence
7th
Kolakoski Constant
5th
4th
45th
12th
4th
11th
11th
107th
7th
4th
Kolakoski Sequence
6th
7th
97th
19th
22nd
250th
11th
8th
Leap Years
45th
54th
23rd
14th
Leyland Numbers
7th
97th
20th
15th
296th
8th
6th
ln 2
5th
4th
Look and Say
14th
5th
115th
18th
33rd
308th
10th
8th
Lucky Numbers
3rd
Niven Numbers
43rd
41st
731st
20th
11th
Number Spiral
4th
5th
Odious Numbers
35th
729th
15th
9th
Odious Numbers (Long)
7th
Pascal’s Triangle
28th
562nd
9th
12th
9th
Pernicious Numbers
31st
41st
479th
21st
8th
Pernicious Numbers (Long)
5th
8th
Prime Numbers
94th
337th
45th
34th
61st
844th
19th
11th
Quine
114th
17th
93rd
350th
69th
1st
527th
8th
Recamán
6th
19th
11th
18th
20th
336th
5th
10th
7th
Rijndael S-box
5th
2nd
8th
4th
5th
5th
3rd
5th
Rule 110
5th
18th
14th
226th
6th
8th
Sierpiński Triangle
7th
18th
98th
20th
24th
21st
266th
10th
9th
7th
Smith Numbers
5th
6th
Tongue-twisters
134th
16th
15th
20th
223rd
10th
8th
7th
Vampire Numbers
43rd
11th
172nd
6th
3rd
Van Eck Sequence
6th
16th
21st
248th
8th
7th
γ
13th
6th
4th
9th
11th
4th
2nd
8th
3rd
3rd
4th
4th
6th
λ
35th
6th
79th
15th
9th
117th
8th
5th
π
5th
167th
74th
37th
53rd
384th
11th
8th
6th
τ
26th
5th
86th
63rd
32nd
208th
8th
6th
φ
8th
7th
5th
65th
59th
26th
29th
7th
31st
17th
37th
272nd
25th
54th
12th
7th
7th
4th
9th
5th
11th
√2
5th
80th
48th
7th
397th
19th
4th
10th
6th
𝑒
35th
85th
65th
9th
31st
301st
18th
31st
59th
7th
8th
6th