OFFSET
1,1
COMMENTS
No terms == 1 (mod 3), as e.g. 2^k + 2^2 + 1 == 0 mod 7 when k == 1 (mod 3). - Robert Israel, Dec 22 2024
MAPLE
R:= NULL:
for k from 1 to 10000 do
if Irreduc(x^k + x^2 + 1) mod 7 then R:= R, k fi
od:
R; # Robert Israel, Dec 22 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Jan 16 2001
EXTENSIONS
2 inserted and more terms from Robert Israel, Dec 22 2024
STATUS
approved