12 Days of Christmas
6th
99 Bottles of Beer
17th
Abundant Numbers
12th924th
Abundant Numbers (Long)
6th
Arithmetic Numbers
7th
Arrows
12th
ASCII Table
8th
Catalan Numbers
17th
Christmas Trees
9th
Collatz
14th521st
54th
CSS Colors
17th
Day of Week
1st
Diamonds
8th
Divisors
15th1,298th
Emirp Numbers
18th
Emirp Numbers (Long)
7th
Emojify
6th
Evil Numbers
25th859th
Evil Numbers (Long)
17th447th
Farey Sequence
11th
Fibonacci
8th1,622nd
Fizz Buzz
117th601st37th505th1,252nd199th66th91st141st1st1,160th122nd233rd239th43rd31st
Foo Fizz Buzz Bar
28th
1st422nd
Fractions
8th470th
Happy Numbers
20th
Happy Numbers (Long)
7th
Inventory Sequence
10th
ISBN
12th
Kolakoski Sequence
10th
Leap Years
1st899th
Leyland Numbers
8th
Look and Say
8th
Lucky Numbers
7th
Medal Tally
7th
Niven Numbers
27th
Niven Numbers (Long)
3rd
Number Spiral
6th
Odious Numbers
22nd622nd
Odious Numbers (Long)
17th348th
Ordinal Numbers
9th
Pangram Grep
16th
Pascal’s Triangle
13th
Pernicious Numbers
31st541st
Pernicious Numbers (Long)
13th
Prime Numbers
16th1,013th
Prime Numbers (Long)
15th
Quine
1st
Recamán
12th
Reverse Polish Notation
10th
Rock-paper-scissors-Spock-lizard
8th
Roman to Arabic
12th
ROT13
6th
Seven Segment
5th
Sierpiński Triangle
15th
Star Wars Opening Crawl
5th
Ten-pin Bowling
7th
Tic-tac-toe
8th
Time Distance
5th
Tongue-twisters
14th295th
Transpose Sentence
3rd
United States
12th
Vampire Numbers
8th
Van Eck Sequence
13th
Zeckendorf Representation
8th
π
15th