12 Days of Christmas
11th
306th
25th
33rd
53rd
766th
10th
11th
99 Bottles of Beer
7th
13th
420th
24th
17th
35th
61st
851st
7th
11th
Abundant Numbers
14th
21st
18th
282nd
48th
36th
891st
16th
13th
17th
11th
Abundant Numbers (Long)
8th
Arithmetic Numbers
6th
Ascending Primes
7th
9th
10th
2nd
7th
2nd
7th
7th
3rd
7th
3rd
4th
4th
6th
Catalan Numbers
4th
Catalan’s Constant
4th
3rd
3rd
4th
4th
Christmas Trees
247th
23rd
36th
54th
668th
10th
7th
Collatz
6th
Cubes
4th
4th
85th
14th
13th
4th
6th
Diamonds
33rd
127th
23rd
18th
28th
442nd
62nd
9th
8th
8th
Divisors
47th
61st
19th
12th
Emirp Numbers
147th
22nd
28th
523rd
8th
5th
Evil Numbers
296th
37th
992nd
15th
10th
Fibonacci
77th
58th
1,701st
55th
31st
Fizz Buzz
74th
76th
450th
49th
1,278th
113th
8th
137th
260th
46th
16th
293rd
136th
59th
35th
Happy Numbers
46th
142nd
23rd
541st
10th
4th
Inventory Sequence
7th
Kolakoski Constant
5th
4th
45th
12th
4th
11th
9th
103rd
7th
4th
Kolakoski Sequence
6th
7th
96th
19th
22nd
250th
10th
8th
Leap Years
45th
54th
23rd
14th
Leyland Numbers
7th
97th
19th
15th
294th
7th
6th
ln 2
5th
4th
Look and Say
14th
5th
114th
18th
33rd
306th
9th
8th
Lucky Numbers
3rd
Niven Numbers
43rd
41st
730th
20th
11th
Number Spiral
4th
5th
Odious Numbers
35th
726th
15th
9th
Odious Numbers (Long)
7th
Pascal’s Triangle
28th
561st
9th
11th
9th
Pernicious Numbers
31st
41st
475th
21st
8th
Pernicious Numbers (Long)
10th
5th
8th
Prime Numbers
94th
337th
45th
34th
61st
841st
19th
11th
Quine
114th
17th
93rd
350th
69th
1st
525th
8th
Recamán
6th
19th
11th
18th
19th
335th
5th
10th
7th
Rijndael S-box
5th
2nd
8th
4th
3rd
4th
3rd
4th
Rule 110
5th
18th
14th
225th
6th
8th
Sierpiński Triangle
7th
18th
99th
20th
24th
21st
267th
10th
9th
7th
Smith Numbers
5th
6th
Tongue-twisters
133rd
17th
15th
20th
207th
10th
7th
7th
Vampire Numbers
43rd
10th
168th
6th
3rd
Van Eck Sequence
6th
16th
20th
247th
8th
7th
γ
13th
4th
4th
9th
10th
4th
2nd
8th
3rd
3rd
4th
4th
6th
λ
35th
3rd
76th
15th
9th
108th
8th
5th
π
5th
163rd
74th
37th
52nd
375th
11th
8th
6th
τ
26th
5th
86th
63rd
32nd
204th
8th
6th
φ
8th
7th
5th
63rd
59th
26th
29th
7th
31st
15th
36th
270th
25th
53rd
11th
7th
7th
4th
9th
5th
10th
√2
5th
80th
48th
7th
393rd
19th
4th
10th
6th
𝑒
33rd
85th
65th
9th
31st
298th
18th
31st
58th
7th
8th
6th