Christmas Trees
19th
Divisors
1st
Emirp Numbers
118th
Evil Numbers
143rd
Fibonacci
194th
Fizz Buzz
63rd
Happy Numbers
71st
Niven Numbers
223rd
Odious Numbers
131st
Pangram Grep
63rd
Pascal’s Triangle
89th
Pernicious Numbers
115th
Prime Numbers
92nd
Quine
81st
Sierpiński Triangle
135th
π
67th
τ
56th
φ
79th
𝑒
149th