Christmas Trees
18th
Divisors
1st
Emirp Numbers
115th
Evil Numbers
138th
Fibonacci
189th
Fizz Buzz
59th
Happy Numbers
66th
Niven Numbers
213th
Odious Numbers
127th
Pangram Grep
62nd
Pascal’s Triangle
80th
Pernicious Numbers
110th
Prime Numbers
84th
Quine
74th
Sierpiński Triangle
131st
π
64th
τ
53rd
φ
74th
𝑒
142nd