[NaS]

Could be a conversion for different character sets, target could be ANSI (256 chars, would match - just a guess tho).

The formula may look weird but could be simplified from the original.

EDIT: Scratch that, it's a simple form of encryption.

It just offsets each character by a number calculated from its position. Can be "decrypted" again by doing

Код:

string[x] -= (3^x) * (x % 15);

if(string[x] < 0) string[x] += 256;