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Search: id:A057484
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| A057484 |
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Numbers n such that x^n + 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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| 7, 8, 12, 14, 16, 17, 18, 19, 21, 23, 36, 37, 42, 61, 88, 112, 147, 171, 239, 253, 302, 304, 333, 402, 472, 597, 619, 718
(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^5 + x^4 + x^3 + x^2 + x + 1, Modulus -> 2 ]] == ToString[ x^n + x^5 + x^4 + x^3 + x^2 + x + 1 ], Print[ n ]], {n, 0, 750} ]
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CROSSREFS
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Sequence in context: A050796 A106630 A050798 this_sequence A050901 A105832 A059177
Adjacent sequences: A057481 A057482 A057483 this_sequence A057485 A057486 A057487
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KEYWORD
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nonn,more
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 27 2000
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