12 Days of Christmas
8th
99 Bottles of Beer
106th
4th
Abundant Numbers
16th
23rd
11th
Abundant Numbers (Long)
3rd
Arithmetic Numbers
2nd
Ascending Primes
15th
ASCII Table
14th
Catalan Numbers
28th
Christmas Trees
10th
Collatz
7th
Day of Week
1st
Divisors
75th
4th
Emirp Numbers
5th
Emojify
7th
Evil Numbers
23rd
56th
10th
Evil Numbers (Long)
11th
Farey Sequence
1st
Fibonacci
6th
Foo Fizz Buzz Bar
2nd
Fractions
1st
Happy Numbers
6th
11th
Happy Numbers (Long)
2nd
Hexdump
11th
Inventory Sequence
12th
ISBN
16th
Kolakoski Constant
7th
Kolakoski Sequence
17th
Leap Years
13th
47th
3rd
Leyland Numbers
37th
3rd
Look and Say
20th
Medal Tally
14th
Musical Chords
9th
Niven Numbers
1st
23rd
Niven Numbers (Long)
1st
Number Spiral
12th
Odious Numbers
51st
10th
Odious Numbers (Long)
9th
Ordinal Numbers
46th
2nd
Pangram Grep
5th
Pascal’s Triangle
65th
3rd
Pernicious Numbers
46th
30th
Pernicious Numbers (Long)
4th
Prime Numbers
64th
9th
Prime Numbers (Long)
1st
Quine
1st
Recamán
6th
Reverse Polish Notation
10th
Rule 110
23rd
Seven Segment
18th
Sierpiński Triangle
46th
16th
Smith Numbers
12th
Spelling Numbers
3rd
24th
4th
Tongue-twisters
22nd
United States
41st
14th
Van Eck Sequence
13th
1st
π
6th
τ
9th
φ
19th
√2
11th
𝑒
8th