12 Days of Christmas
4th
135th
24 Game
4th
99 Bottles of Beer
145th
1st
521st
10th12th
Abundant Numbers
312th
12th
109th
12th
Abundant Numbers (Long)
161st
9th
90th
Arabic to Roman
3rd
Arithmetic Numbers
91st
18th
18th
24th
Ascending Primes
9th6th
ASCII Table
389th
7th
brainfuck
103rd
368th
Card Number Validation
145th
Catalan Numbers
25th
226th
9th5th
Catalan’s Constant
10th15th
7th
22nd
11th
9th
6th
7th
6th
4th9th
Christmas Trees
19th
10th
30th
2nd
837th
34th9th
Collatz
20th
24th19th
37th
30th
26th59th
213th
23rd
7th
11th
CSS Colors
11th
Cubes
15th
Day of Week
148th
Diamonds
12th
47th
6th
93rd
9th
Divisors
30th
452nd54th
1st
1st
12th
13th
Emirp Numbers
20th
34th
13th38th
638th
6th
Emirp Numbers (Long)
336th
Emojify
7th
80th
Evil Numbers
28th
45th
31st
625th
15th
11th
Evil Numbers (Long)
22nd
18th
381st
Factorial Factorisation
18th
Farey Sequence
7th
19th
20th
225th
Fibonacci
514th
59th
7th
127th
32nd
1st
121st
82nd
68th46th
Fizz Buzz
88th44th
755th
46th
1st152nd
9th
367th
63rd
18th369th
49th21st64th47th
Foo Fizz Buzz Bar
882nd
Gijswijt’s Sequence
7th
12th
Happy Numbers
8th
6th
Happy Numbers (Long)
386th
Inventory Sequence
247th
Kolakoski Constant
8th
42nd
12th
15th
14th16th
147th
16th
7th
9th4th
Kolakoski Sequence
39th
9th
Leap Years
11th
381st
16th
Leyland Numbers
25th
9th
9th7th
ln 2
31st
Look and Say
25th
14th
10th
9th
Lucky Numbers
261st
Medal Tally
70th
Morse Decoder
14th
150th
Morse Encoder
14th
Niven Numbers
12th
25th
46th
70th
16th
Niven Numbers (Long)
11th
479th
Number Spiral
197th
Odious Numbers
1st
30th
314th
10th
Odious Numbers (Long)
1st
16th
231st
Pangram Grep
3rd
Pascal’s Triangle
36th
35th
9th
Pernicious Numbers
1st
653rd
10th
Pernicious Numbers (Long)
1st
284th
7th
Polyominoes
91st
Prime Numbers
1st
332nd
24th
494th
126th
23rd11th
Prime Numbers (Long)
1st
249th
71st
Quine
138th
1st
81st
Recamán
9th
9th
Reverse Polish Notation
248th
Rijndael S-box
20th
ROT13
159th
Seven Segment
5th
Sierpiński Triangle
11th15th16th14th18th
73rd41st43rd15th12th10th
19th21st20th11th19th11th
28th14th32nd16th16th39th120th22nd16th27th18th17th11th23rd28th27th9th344th15th33rd52nd35th8th
12th16th10th
11th7th15th
Smith Numbers
11th
9th
Sudoku
137th
Tongue-twisters
19th
222nd
8th
Tower of Hanoi
6th
Trinomial Triangle
14th
United States
12th
346th
Vampire Numbers
4th
Van Eck Sequence
50th
16th
10th
γ
18th
5th
λ
12th
70th52nd
9th
27th12th
27th
15th
16th
21st
12th
12th20th
148th
16th33rd18th
12th8th
10th6th
π
132nd
194th78th
43rd
405th
6th
τ
12th
9th
6th
φ
15th42nd
37th15th
75th
39th22nd
363rd
6th
√2
39th
6th
𝑒
29th15th23rd10th86th73rd
15th
49th32nd16th35th11th27th
16th
37th
9th54th113th77th
38th12th21st7th41st25th47th13th411th97th15th67th26th
26th8th12th10th6th11th7th12th