A057461 - OEIS

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A057461

Numbers n such that x^n + x^3 + 1 is irreducible over GF(2).

1, 2, 4, 5, 6, 7, 10, 12, 17, 18, 20, 25, 28, 31, 41, 52, 66, 130, 151, 180, 196, 503, 650, 761, 986, 1391, 1596, 2047, 2700 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`Joerg Arndt, Fxtbook`
	MATHEMATICA	`Do[ If[ ToString[ Factor[ x^n + x^3 + 1, Modulus -> 2 ] ] == ToString[ x^n + x^3 + 1 ], Print[ n ] ], {n, 0, 750} ]`
	CROSSREFS	`Cf. A002475.` `Sequence in context: A047570 A129132 A191843 * A139448 A070116 A039057` `Adjacent sequences: A057458 A057459 A057460 * A057462 A057463 A057464`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 27 2000`
	EXTENSIONS	`a(24) - a(29) from Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 06 2010`

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Last modified February 14 21:59 EST 2012. Contains 205667 sequences.