### 12 Days of Christmas

### 99 Bottles of Beer

13^{th}

### Abundant Numbers

13^{th}

### Arabic to Roman

### brainfuck

### Christmas Trees

15^{th}

### CSS Colors

### Cubes

### Diamonds

### Divisors

17^{th}

### Emirp Numbers

11^{th}

### Emojify

### Evil Numbers

26^{th}

### Fibonacci

46^{th}

### Fizz Buzz

94^{th}

### Happy Numbers

### Intersection

### Kolakoski Constant

### Kolakoski Sequence

### Leap Years

24^{th}

### Levenshtein Distance

### Leyland Numbers

### Look and Say

### Lucky Tickets

### Morse Decoder

7^{th}

### Morse Encoder

6^{th}

### Niven Numbers

12^{th}

### Odious Numbers

18^{th}

### Ordinal Numbers

11^{th}

### Pangram Grep

### Pascal’s Triangle

8^{th}

### Pernicious Numbers

### Poker

### Prime Numbers

16^{th}

### Quine

### Recamán

### Rock-paper-scissors-Spock-lizard

### Roman to Arabic

14^{th}

### Rule 110

### Seven Segment

11^{th}

### Sierpiński Triangle

### Spelling Numbers

### Star Wars Opening Crawl

### Sudoku

### Sudoku v2

### Ten-pin Bowling

### Tongue-twisters

### United States

### Vampire Numbers

### Van Eck Sequence

### λ

### π

6^{th}