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Search: id:A057485
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| A057485 |
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Numbers n such that x^n + x^7 + x^6 + x^5 + x^4 + x^3 + x^2 + x + 1 is irreducible over GF(2). |
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+0
1
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| 10, 12, 15, 18, 25, 31, 34, 52, 55, 57, 127, 172, 220, 300, 393, 492
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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Do[ If[ ToString[ Factor[ x^n + x^7 + x^6 + x^5 + x^4 + x^3 + x^2 + x + 1, Modulus -> 2 ] ] == ToString[ x^n + x^7 + x^6 + x^5 + x^4 + x^3 + x^2 + x + 1 ], Print[ n ] ], {n, 0, 700} ]
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CROSSREFS
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Sequence in context: A006793 A054518 A072198 this_sequence A107836 A096128 A063192
Adjacent sequences: A057482 A057483 A057484 this_sequence A057486 A057487 A057488
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 27 2000
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