OFFSET
0,1
LINKS
Eric M. Schmidt, Table of n, a(n) for n = 0..11
Eric Weisstein's World of Mathematics, Fermat Number
PROG
(PARI) a(n) = vecmax(factor(2^(2^n) + 1)[, 1]); \\ Michel Marcus, Jul 05 2017
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, May 12 2002
EXTENSIONS
Offset changed by Arkadiusz Wesolowski, Jul 09 2011
STATUS
approved