12 Days of Christmas
4th
90th
99 Bottles of Beer
118th
1st
388th
7th
11th
Abundant Numbers
11th
72nd
11th
Abundant Numbers (Long)
8th
52nd
Arabic to Roman
2nd
Arithmetic Numbers
55th
11th
9th
17th
ASCII Table
255th
5th
Catalan Numbers
19th
145th
6th
4th
Catalan’s Constant
9th
7th
4th
4th
16th
7th
6th
5th
4th
4th
4th
7th
Christmas Trees
14th
23rd
2nd
668th
8th
Collatz
14th
11th
10th
30th
20th
21st
47th
137th
18th
5th
6th
CSS Colors
9th
Cubes
13th
Day of Week
85th
Diamonds
10th
5th
8th
Divisors
24th
47th
1st
1st
8th
12th
Emirp Numbers
18th
23rd
12th
35th
526th
5th
Emojify
6th
48th
Evil Numbers
23rd
37th
26th
10th
Evil Numbers (Long)
17th
14th
Farey Sequence
6th
11th
15th
6th
117th
Fibonacci
449th
7th
95th
41st
26th
1st
90th
50th
56th
31st
Fizz Buzz
74th
32nd
607th
30th
1st
131st
8th
340th
46th
16th
320th
36th
12th
59th
35th
Foo Fizz Buzz Bar
636th
Gijswijt’s Sequence
6th
8th
Happy Numbers
8th
4th
Kolakoski Constant
7th
35th
10th
12th
11th
9th
103rd
8th
4th
7th
4th
Kolakoski Sequence
8th
Leap Years
9th
295th
14th
Leyland Numbers
8th
7th
6th
ln 2
23rd
Look and Say
20th
13th
8th
Medal Tally
43rd
Morse Decoder
13th
110th
Morse Encoder
12th
Niven Numbers
15th
20th
40th
54th
11th
Niven Numbers (Long)
8th
Number Spiral
133rd
Odious Numbers
1st
23rd
214th
9th
Odious Numbers (Long)
1st
10th
145th
Pangram Grep
3rd
Pascal’s Triangle
28th
31st
9th
Pernicious Numbers
1st
532nd
8th
Pernicious Numbers (Long)
4th
184th
5th
Prime Numbers
1st
20th
382nd
19th
11th
Prime Numbers (Long)
1st
171st
Quine
114th
1st
52nd
Recamán
9th
7th
Seven Segment
5th
Sierpiński Triangle
10th
11th
10th
11th
13th
9th
57th
32nd
26th
7th
6th
18th
13th
9th
16th
7th
22nd
8th
32nd
16th
10th
28th
97th
20th
8th
14th
23rd
13th
13th
9th
20th
21st
22nd
8th
267th
9th
31st
41st
26th
10th
14th
8th
9th
7th
11th
5th
Smith Numbers
10th
5th
Tongue-twisters
15th
164th
7th
United States
10th
247th
Vampire Numbers
3rd
Van Eck Sequence
46th
14th
7th
γ
4th
λ
10th
61st
38th
5th
10th
19th
12th
14th
15th
19th
8th
9th
15th
109th
14th
26th
13th
10th
6th
8th
5th
π
104th
32nd
6th
τ
12th
5th
6th
φ
9th
34th
13th
59th
28th
31st
15th
272nd
5th
√2
30th
6th
𝑒
14th
11th
17th
6th
67th
56th
7th
10th
24th
20th
28th
6th
37th
85th
65th
6th
24th
29th
9th
17th
5th
31st
17th
36th
11th
299th
55th
15th
58th
14th
21st
6th
7th
9th
5th
8th
6th
9th
22nd