12 Days of Christmas
192nd
Abundant Numbers
32nd
Abundant Numbers (Long)
5th
Catalan Numbers
63rd
Christmas Trees
151st
Collatz
95th
CSS Colors
59th
Cubes
117th
Divisors
1st
Emirp Numbers
67th
Emirp Numbers (Long)
29th
Evil Numbers
1st
Evil Numbers (Long)
29th
Fibonacci
131st
Fizz Buzz
46th
Foo Fizz Buzz Bar
1st
Fractions
52nd
Game of Life
49th
Happy Numbers
145th
Happy Numbers (Long)
77th
Inventory Sequence
50th
Kolakoski Sequence
16th
Leap Years
106th
Leyland Numbers
4th
Look and Say
64th
Lucky Numbers
57th
Niven Numbers
50th
Niven Numbers (Long)
27th
Odious Numbers
1st
Odious Numbers (Long)
1st
Ordinal Numbers
134th
Pangram Grep
1st
Pascal’s Triangle
1st
Pernicious Numbers
66th
Pernicious Numbers (Long)
39th
Prime Numbers
1st
Prime Numbers (Long)
1st
Quine
52nd
Recamán
72nd
Reverse Polish Notation
19th
Smith Numbers
25th
Tongue-twisters
124th
United States
55th
Vampire Numbers
25th
Van Eck Sequence
49th
π
147th
τ
118th
φ
104th
√2
1st
𝑒
1st
19th