12 Days of Christmas
212th
Abundant Numbers
33rd
Abundant Numbers (Long)
4th
Catalan Numbers
67th
Christmas Trees
161st
Collatz
106th
CSS Colors
67th
Cubes
136th
Divisors
1st
Emirp Numbers
69th
Emirp Numbers (Long)
33rd
Evil Numbers
1st
Evil Numbers (Long)
31st
Fibonacci
146th
Fizz Buzz
49th
Foo Fizz Buzz Bar
1st
Fractions
65th
Game of Life
54th
Happy Numbers
156th
Happy Numbers (Long)
84th
Inventory Sequence
54th
Kolakoski Sequence
15th
Leap Years
114th
Leyland Numbers
5th
Look and Say
69th
Lucky Numbers
62nd
Niven Numbers
56th
Niven Numbers (Long)
32nd
Odious Numbers
1st
Odious Numbers (Long)
1st
Ordinal Numbers
145th
Pangram Grep
1st
Pascal’s Triangle
1st
Pernicious Numbers
72nd
Pernicious Numbers (Long)
41st
Prime Numbers
1st
Prime Numbers (Long)
1st
Quine
55th
Recamán
76th
Reverse Polish Notation
21st
Smith Numbers
28th
Tongue-twisters
138th
United States
62nd
Vampire Numbers
29th
Van Eck Sequence
55th
π
156th
τ
122nd
φ
108th
√2
1st
𝑒
1st
23rd