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A057476 Numbers n such that x^n + x^6 + 1 is irreducible over GF(2). 1
1, 3, 5, 7, 17, 31, 71, 97, 167, 175, 209, 385 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

MATHEMATICA

Do[ If[ ToString[ Factor[ x^n + x^6 + 1, Modulus -> 2 ] ] == ToString[ x^n + x^6 + 1 ], Print[ n ] ], {n, 0, 750} ]

CROSSREFS

Cf. A002475.

Sequence in context: A032496 A002092 A174394 * A016041 A140797 A038893

Adjacent sequences:  A057473 A057474 A057475 * A057477 A057478 A057479

KEYWORD

nonn

AUTHOR

Robert G. Wilson v, Sep 27 2000

STATUS

approved

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Last modified June 18 16:55 EDT 2013. Contains 226355 sequences.