Arabic to Roman
1st
Christmas Trees
32nd
Divisors
62nd1st
Evil Numbers
33rd
Fibonacci
41st
214th130th
Happy Numbers
16th
Leap Years
12th
Niven Numbers
22nd
Odious Numbers
1st
Pascal’s Triangle
41st
Pernicious Numbers
41st
Prime Numbers
43rd1st
81st
Prime Numbers (Long)
1st
Quine
146th1st
1st
Roman to Arabic
Spelling Numbers
1st
λ
50th
π
8th
3rd58th
τ
13th
3rd62nd
φ
19th
√2
15th
𝑒
13th6th18th57th303rd