A058236 Numbers n such that x^n + x^3 + 2 is irreducible over GF(3).

2, 4, 8, 40, 44, 56, 64, 148, 200, 320, 328, 400, 1280

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Prog

(PARI) is(k) = polisirreducible(Mod(1, 3)*(x^k + x^3 + 2)); \\ Jinyuan Wang, Apr 15 2020

Crossrefs

Cf. A057461.

Sequence in context: A393042 A172977 A018380 * A259120 A319595 A285632

Adjacent sequences: A058233 A058234 A058235 * A058237 A058238 A058239

Keyword

nonn,more

Author

Robert G. Wilson v, Dec 01 2000

Extensions

a(13) from Jinyuan Wang, Apr 15 2020

Status

approved