12 Days of Christmas
25th
99 Bottles of Beer
23rd
Abundant Numbers
30th797th
Abundant Numbers (Long)
19th
Arithmetic Numbers
13th
ASCII Table
8th
Catalan Numbers
25th
Catalan’s Constant
13th
Christmas Trees
26th
Collatz
18th448th
CSS Colors
18th
Cubes
12th
Day of Week
1st
Diamonds
24th
Divisors
53rd567th
Emirp Numbers
36th
Emojify
18th
Evil Numbers
37th
Evil Numbers (Long)
25th
Farey Sequence
10th
Fibonacci
33rd148th
Fizz Buzz
1st824th53rd
Foo Fizz Buzz Bar
4th308th
Fractions
19th
Happy Numbers
28th
Happy Numbers (Long)
17th
Intersection
15th
Kolakoski Constant
14th
Kolakoski Sequence
21st
Leap Years
1st
Leyland Numbers
24th
Look and Say
14th
Lucky Numbers
8th
Morse Decoder
11th
Niven Numbers
29th
Niven Numbers (Long)
3rd
Number Spiral
8th
Odious Numbers
31st
Odious Numbers (Long)
22nd
Ordinal Numbers
24th
Pangram Grep
27th
Pascal’s Triangle
24th
Pernicious Numbers
51st
Prime Numbers
46th
Prime Numbers (Long)
23rd
Quine
1st
Recamán
18th
Rijndael S-box
15th
Rock-paper-scissors-Spock-lizard
13th
Roman to Arabic
20th
Seven Segment
24th
Sierpiński Triangle
21st
Sudoku
6th
Tongue-twisters
26th
United States
17th279th
Vampire Numbers
13th
π
31st
τ
18th