Hello I would like to know if it was possible to generate a bitcoin address with some letters only, I explain myself
ex: 15nE3ebnYkJYRok2H9H9Xdw1widwPtYt7TD4
1E3en5widwbn..........
1onbwE53................
with certain letter only
You are looking for Bitcoin Vanity Address.
Check this out:
https://bitcointalk.org/index.php?topic=25804.0