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A071565 Numbers n such that x^n + x^(n-1) + x^(n-2) + ... + x + 1 is irreducible over GF(7). 0
4, 10, 12, 16, 22, 40, 60, 66, 70, 78, 88, 96, 100, 106, 126, 150, 162, 172, 178, 210, 228, 238, 240, 256, 262, 268, 292, 346, 348, 358, 378, 396, 430, 432, 442, 460, 490, 498, 508, 520, 546, 576, 592, 598, 600, 630, 658, 676, 682, 732, 738, 742, 760, 772 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

FORMULA

a(n) = A019337(n+1) - 1. - Joerg Arndt, Apr 17 2020

CROSSREFS

Cf. A071642.

Cf. A019337. - Joerg Arndt, Apr 17 2020

Sequence in context: A117099 A026180 A109274 * A233741 A310340 A285570

Adjacent sequences:  A071562 A071563 A071564 * A071566 A071567 A071568

KEYWORD

easy,nonn

AUTHOR

Robert G. Wilson v, Jun 22 2002

STATUS

approved

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Last modified October 31 05:06 EDT 2020. Contains 338098 sequences. (Running on oeis4.)