12 Days of Christmas
17th
99 Bottles of Beer
19th
Abundant Numbers
15th921st
Abundant Numbers (Long)
6th
Arithmetic Numbers
7th
Arrows
12th
ASCII Table
8th
Catalan Numbers
16th
Christmas Trees
9th
Collatz
14th518th
53rd
CSS Colors
17th
Day of Week
1st
Diamonds
9th
Divisors
15th1,294th
Emirp Numbers
19th
Emirp Numbers (Long)
7th
Emojify
6th
Evil Numbers
26th850th
Evil Numbers (Long)
17th435th
Farey Sequence
11th
Fibonacci
8th1,606th
Fizz Buzz
115th594th37th492nd1,248th199th66th89th141st1st1,170th121st232nd238th42nd31st
Foo Fizz Buzz Bar
28th
4th438th
Fractions
8th470th
Happy Numbers
22nd
Happy Numbers (Long)
7th
Inventory Sequence
10th
ISBN
12th
Kolakoski Sequence
10th
Leap Years
1st894th
Leyland Numbers
9th
Look and Say
8th
Lucky Numbers
7th
Medal Tally
6th
Niven Numbers
29th
Niven Numbers (Long)
3rd
Number Spiral
6th
Odious Numbers
24th615th
Odious Numbers (Long)
17th338th
Ordinal Numbers
9th
Pangram Grep
16th
Pascal’s Triangle
13th
Pernicious Numbers
34th544th
Pernicious Numbers (Long)
13th
Prime Numbers
19th1,009th
Prime Numbers (Long)
15th
Quine
1st
Recamán
12th
Reverse Polish Notation
10th
Rock-paper-scissors-Spock-lizard
7th
Roman to Arabic
12th
ROT13
6th
Seven Segment
8th
Sierpiński Triangle
15th
Star Wars Opening Crawl
5th
Ten-pin Bowling
7th
Tic-tac-toe
8th
Time Distance
5th
Tongue-twisters
14th303rd
Transpose Sentence
3rd
United States
13th
Vampire Numbers
11th
Van Eck Sequence
13th
Zeckendorf Representation
8th
π
15th