12 Days of Christmas
213th
Abundant Numbers
34th
Abundant Numbers (Long)
4th
Catalan Numbers
68th
Christmas Trees
161st
Collatz
106th
CSS Colors
67th
Cubes
137th
Divisors
1st
Emirp Numbers
70th
Emirp Numbers (Long)
33rd
Evil Numbers
1st
Evil Numbers (Long)
32nd
Fibonacci
147th
Fizz Buzz
49th
Foo Fizz Buzz Bar
1st
Fractions
66th
Game of Life
54th
Happy Numbers
156th
Happy Numbers (Long)
84th
Inventory Sequence
56th
Kolakoski Sequence
16th
Leap Years
114th
Leyland Numbers
6th
Look and Say
70th
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
73rd
Pernicious Numbers (Long)
41st
Prime Numbers
1st
Prime Numbers (Long)
1st
Quine
55th
Recamán
77th
Reverse Polish Notation
21st
Smith Numbers
29th
Tongue-twisters
138th
United States
63rd
Vampire Numbers
29th
Van Eck Sequence
55th
π
156th
τ
122nd
φ
109th
√2
1st
𝑒
1st
24th