if (!new File(fname).exists()) {
PrintWriter outfile = new PrintWriter(new OutputStreamWriter(new FileOutputStream(fname)));
for(int i=0; i<rsize/2+1; i++) test(i, rsize, outfile);
if (!new File(fname).exists()) {
PrintWriter outfile = new PrintWriter(new OutputStreamWriter(new FileOutputStream(fname)));
for(int i=0; i<rsize/2+1; i++) test(i, rsize, outfile);