12 Days of Christmas
39th
824th
99 Bottles of Beer
19th
810th
Abundant Numbers
21st
606th
Abundant Numbers (Long)
16th
357th
Alphabetic Numbers
20th
70th
Arabic to Roman
1st
318th
Arithmetic Numbers
11th
265th
Arrows
12th
326th
Ascending Primes
11th
220th
ASCII Table
14th
278th
Calendar
5th
171st
Card Number Validation
11th
177th
Catalan Numbers
22nd
222nd
Catalan’s Constant
9th
138th
Christmas Trees
13th
710th
Collatz
20th
617th
Continued Fractions
5th
113th
Cubes
8th
358th
Day of Week
8th
334th
Diamonds
13th34th
450th
79th
Divisors
33rd
523rd
Emirp Numbers
32nd
600th
Emirp Numbers (Long)
11th
284th
Emojify
12th
317th
Evil Numbers
1st
777th
72nd
Evil Numbers (Long)
1st
444th
Factorial Factorisation
8th
148th
Farey Sequence
15th
205th
Fibonacci
61st
1,192nd
Fizz Buzz
60th
106th
40th
382nd1,503rd
142nd
924th
121st
367th
Foo Fizz Buzz Bar
18th
570th
Fractions
18th
400th
Game of Life
8th
175th
Gijswijt’s Sequence
9th
147th
Gray Code Decoder
10th
109th
Gray Code Encoder
13th
112th
Happy Numbers
29th
106th
381st
Happy Numbers (Long)
15th
231st
Hilbert Curve
7th
75th
Intersection
9th
215th
Inventory Sequence
13th
246th
ISBN
20th
21st312th
Jacobi Symbol
9th
125th
Kaprekar Numbers
13th
105th
Kolakoski Constant
9th
120th
Kolakoski Sequence
13th
238th
Leap Years
9th
813th
Levenshtein Distance
21st
11th
168th
9th21st
Leyland Numbers
13th
340th
ln 2
12th
212th
Look and Say
13th
236th
Lucky Numbers
13th
56th
262nd
Lucky Tickets
10th
157th
Mandelbrot
5th
111th
Maze
6th
143rd
Minesweeper
5th
109th
Morse Decoder
10th
191st
Morse Encoder
7th
218th
Musical Chords
7th
120th
N Queens
7th
110th
Nim
5th
31st
86th
Niven Numbers
35th
512th
Niven Numbers (Long)
15th
288th
Number Spiral
24th
182nd
Odious Numbers
1st
546th
Odious Numbers (Long)
1st
334th
Ordinal Numbers
20th
364th
PalindromemordnilaP
9th
192nd
Pangram Grep
13th
337th
Partition Numbers
10th
88th
Pascal’s Triangle
18th
79th
280th
Pernicious Numbers
5th
446th
Pernicious Numbers (Long)
17th
209th
Prime Numbers
9th
679th
Prime Numbers (Long)
9th
486th
Proximity Grid
4th
134th
Quine
110th
94th
Recamán
15th
405th
Repeating Decimals
5th
136th
Reverse Polish Notation
9th
238th
Rijndael S-box
6th
110th
Rock-paper-scissors-Spock-lizard
11th
17th
303rd
Roman to Arabic
24th
167th
ROT13
7th
34th108th
Rule 110
11th
182nd
Scrambled Sort
8th
137th
Semiprime Numbers
4th
47th
Set
5th
123rd
Seven Segment
10th
398th
Sierpiński Triangle
12th
137th
Smith Numbers
8th
191st
Spelling Numbers
112th
159th
Sphenic Numbers
3rd
45th
Taxicab Numbers
6th
87th
Ten-pin Bowling
7th
111th
Tic-tac-toe
6th
156th
Time Distance
8th
139th
Topological Sort
5th
102nd
Tower of Hanoi
23rd
101st
Transpose Sentence
9th
157th
Trinomial Triangle
10th
131st
Ulam Sequence
3rd
61st
United States
12th
352nd
Vampire Numbers
10th
215th
Van Eck Sequence
12th
219th
Zeckendorf Representation
9th
138th
Zodiac Signs
7th
136th
γ
6th
62nd
λ
61st71st
29th
π
18th
244th
τ
17th
178th
φ
30th
178th
√2
14th
241st
𝑒
17th
307th16th