12 Days of Christmas
303rd
Abundant Numbers
124th
Abundant Numbers (Long)
64th
Catalan Numbers
76th
Christmas Trees
213th
Collatz
175th
CSS Colors
61st
Cubes
166th
Divisors
108th
Emirp Numbers
12th
Emirp Numbers (Long)
72nd
Evil Numbers
1st
Evil Numbers (Long)
33rd
Fibonacci
165th
Fizz Buzz
199th
Foo Fizz Buzz Bar
121st
Fractions
133rd
Game of Life
74th
Happy Numbers
205th
Happy Numbers (Long)
114th
Inventory Sequence
77th
Kolakoski Sequence
61st
Leap Years
132nd
Leyland Numbers
81st
Look and Say
112th
Lucky Numbers
88th
Niven Numbers
65th
Niven Numbers (Long)
53rd
Odious Numbers
1st
Odious Numbers (Long)
1st
Ordinal Numbers
187th
Pangram Grep
85th
Pascal’s Triangle
41st
Pernicious Numbers
83rd
Pernicious Numbers (Long)
66th
Prime Numbers
1st
Prime Numbers (Long)
1st
Quine
63rd
Recamán
120th
Reverse Polish Notation
65th
Smith Numbers
66th
Tongue-twisters
190th
United States
84th
Vampire Numbers
64th
Van Eck Sequence
72nd
π
204th
τ
157th
φ
153rd
√2
1st
𝑒
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