id:A057479 - OEIS Search Results

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Numbers n such that x^n + x^9 + 1 is irreducible over GF(2).

+0
2

1, 4, 5, 8, 11, 12, 14, 18, 23, 28, 30, 36, 49, 54, 60, 68, 71, 79, 84, 103, 113, 151, 156, 191, 198, 364, 390, 470, 476, 508, 540, 620, 721 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`Do[ If[ ToString[ Factor[ x^n + x^9 + 1, Modulus -> 2 ] ] == ToString[ x^n + x^9 + 1 ], Print[ n ] ], {n, 0, 750} ]`
	CROSSREFS	`Cf. A002475.` `Sequence in context: A022435 A116050 A056721 this_sequence A050140 A047376 A117573` `Adjacent sequences: A057476 A057477 A057478 this_sequence A057480 A057481 A057482`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 27 2000`

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.

AT&T Labs Research