1,1

Table of n, a(n) for n=1..12.

a(3)=17 because n=3*5*17=255 and 2^256 = 1 (mod 255)

Sequence in context: A278138 A273870 A272060 * A307843 A023394 A176689

Adjacent sequences: A058907 A058908 A058909 * A058911 A058912 A058913

nonn

Joe K. Crump (joecr(AT)carolina.rr.com), Jan 09 2001

Offset corrected by Charles R Greathouse IV, Mar 02 2013

approved