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A374137 Odd numbers k such that the cyclotomic polynomial Phi(k,x) has height 1, i.e., whose coefficients are all -1, 0, or 1.

%I A374137 #7 Jul 07 2024 08:02:06
%S A374137 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,
%T A374137 49,51,53,55,57,59,61,63,65,67,69,71,73,75,77,79,81,83,85,87,89,91,93,
%U A374137 95,97,99,101,103,107,109,111,113,115,117,119,121,123,125,127,129,131,133,135,137,139,141,143,145,147,149,151
%N A374137 Odd numbers k such that the cyclotomic polynomial Phi(k,x) has height 1, i.e., whose coefficients are all -1, 0, or 1.
%H A374137 Antti Karttunen, <a href="/A374137/b374137.txt">Table of n, a(n) for n = 1..12000</a>
%o A374137 (PARI) isA374137 = A374136;
%Y A374137 Cf. A374136 (characteristic function).
%Y A374137 Setwise difference A005408 \ A013590.
%Y A374137 Subsequences: A152955, A117223, A117318.
%Y A374137 Appears to be a subsequence of A089684, from which this differs for the first time at n=125, where a(125) = 257, which misses A089684(125) = 255.
%K A374137 nonn
%O A374137 1,2
%A A374137 _Antti Karttunen_, Jul 06 2024