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%I #11 Aug 22 2021 00:14:04
%S 2,12,16,22,28,30,40,46,58,66,70,72,100,102,108,148,162,172,178,196,
%T 222,232,250,276,280,292,330,366,372,382,418,442,460,462,466,486,498,
%U 556,568,586,592,598,600,612,618,642,646,672,676,682,700,718,760,768
%N Numbers k such that x^k + x^(k-1) + x^(k-2) + ... + x + 1 is irreducible over GF(11).
%F a(n) = A019339(n+1) - 1. - _Ralf Stephan_, Dec 26 2004
%Y Cf. A071642.
%K easy,nonn
%O 1,1
%A _Robert G. Wilson v_, Jun 22 2002
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