id:A057461 - OEIS Search Results

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

+0
2

1, 2, 4, 5, 6, 7, 10, 12, 17, 18, 20, 25, 28, 31, 41, 52, 66, 130, 151, 180, 196, 503, 650 (list; graph; listen)

	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: A080762 A047570 A129132 this_sequence A139448 A070116 A039057` `Adjacent sequences: A057458 A057459 A057460 this_sequence A057462 A057463 A057464`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 27 2000`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.