12 Days of Christmas
10th
247th
24 Game
7th
4th
99 Bottles of Beer
147th
9th
568th
10th12th
Abundant Numbers
322nd
13th
187th
12th
Abundant Numbers (Long)
171st
9th
137th
Arabic to Roman
8th
Arithmetic Numbers
95th
18th
20th
81st
Ascending Primes
9th6th
ASCII Table
418th
6th
brainfuck
107th
386th
Card Number Validation
160th
Catalan Numbers
28th
252nd
9th5th
Catalan’s Constant
17th
9th
23rd
11th
11th
12th
6th
7th
6th
4th11th
Christmas Trees
18th
11th
29th
2nd
853rd
32nd9th
Collatz
24th21st
44th
31st
32nd60th
271st
23rd
8th
12th
CSS Colors
13th
Cubes
8th
18th
Day of Week
179th
Diamonds
14th
49th
7th
98th
10th
Divisors
33rd
464th55th
4th
126th
13th
14th
Emirp Numbers
20th
34th
13th40th
657th
6th
Emirp Numbers (Long)
349th
Emojify
8th
84th
Evil Numbers
31st
46th
32nd
647th
16th
11th
Evil Numbers (Long)
25th
19th
408th
Factorial Factorisation
19th
Farey Sequence
20th
22nd
245th
Fibonacci
529th
63rd
7th
134th
33rd
1st
128th
84th
70th46th
Fizz Buzz
89th
769th
46th
1st152nd
9th
373rd
238th
45th371st
50th21st64th46th
Foo Fizz Buzz Bar
918th
Gijswijt’s Sequence
12th
Happy Numbers
9th
7th
Happy Numbers (Long)
410th
Inventory Sequence
266th
Kolakoski Constant
9th
45th
12th
15th
16th17th
168th
15th
8th
9th4th
Kolakoski Sequence
41st
9th
Leap Years
12th
407th
16th
Leyland Numbers
25th
9th
9th7th
ln 2
36th
Look and Say
26th
14th
13th
9th
Lucky Numbers
284th
Medal Tally
86th
Morse Decoder
16th
176th
Morse Encoder
15th
Niven Numbers
17th
25th
48th
77th
16th
Niven Numbers (Long)
12th
504th
Number Spiral
221st
Odious Numbers
1st
31st
332nd
10th
Odious Numbers (Long)
1st
16th
246th
Pangram Grep
3rd
Pascal’s Triangle
39th
37th
9th
Pernicious Numbers
1st
668th
11th
Pernicious Numbers (Long)
1st
298th
7th
Polyominoes
105th
Prime Numbers
1st
341st
25th
530th
133rd
23rd11th
Prime Numbers (Long)
1st
283rd
74th
Quine
145th
1st
92nd
Recamán
11th
10th
Reverse Polish Notation
266th
Rijndael S-box
22nd
ROT13
165th
Seven Segment
8th
Sierpiński Triangle
11th17th14th20th
74th41st45th15th12th11th
20th21st21st13th19th11th
32nd15th33rd
18th17th41st126th23rd18th29th18th18th12th24th29th30th9th355th14th34th56th36th8th
12th17th10th
11th8th17th
Smith Numbers
9th
Sudoku
145th
Tongue-twisters
14th
22nd
258th
11th
Tower of Hanoi
7th
Trinomial Triangle
14th
United States
15th
363rd
Vampire Numbers
4th
Van Eck Sequence
51st
17th
12th
γ
18th
9th
5th
λ
13th
71st52nd
9th
30th12th
26th
16th
17th10th
22nd
12th
14th23rd
169th
18th40th20th
13th8th
10th6th
π
136th
207th83rd
47th
431st
6th
τ
9th
6th
φ
17th42nd
46th16th
80th
43rd22nd
379th
6th
√2
44th
6th
𝑒
29th15th24th11th91st74th
15th
53rd33rd16th35th16th29th
17th
41st
25th
11th58th121st80th
39th12th22nd11th45th27th51st14th436th102nd16th72nd27th
27th9th12th13th7th11th7th14th