12 Days of Christmas
298th
Abundant Numbers
50th
Abundant Numbers (Long)
8th
Catalan Numbers
104th
Christmas Trees
220th
Collatz
165th
CSS Colors
95th
Cubes
172nd
Divisors
1st
Emirp Numbers
98th
Emirp Numbers (Long)
56th
Evil Numbers
1st
Evil Numbers (Long)
47th
Fibonacci
212th
Fizz Buzz
84th
Foo Fizz Buzz Bar
1st
Fractions
116th
Game of Life
87th
Happy Numbers
202nd
Happy Numbers (Long)
119th
Inventory Sequence
101st
Kolakoski Sequence
24th
Leap Years
162nd
Leyland Numbers
10th
Look and Say
111th
Lucky Numbers
92nd
Niven Numbers
94th
Niven Numbers (Long)
54th
Odious Numbers
1st
Odious Numbers (Long)
1st
Ordinal Numbers
191st
Pangram Grep
1st
Pascal’s Triangle
1st
Pernicious Numbers
106th
Pernicious Numbers (Long)
83rd
Prime Numbers
1st
Prime Numbers (Long)
1st
Quine
92nd
Recamán
110th
Reverse Polish Notation
34th
Smith Numbers
51st
Tongue-twisters
182nd
United States
91st
Vampire Numbers
42nd
Van Eck Sequence
86th
π
217th
τ
173rd
φ
155th
√2
1st
𝑒
1st45th