OFFSET
1,1
PROG
(PARI) is(k) = polisirreducible(Mod(1, 3)*(x^k + x^12 + 2)); \\ Jinyuan Wang, Apr 15 2020
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Robert G. Wilson v, Nov 30 2000
EXTENSIONS
a(17)-a(18) from Jinyuan Wang, Apr 15 2020
STATUS
approved