A086794 Numbers k such that the k-th cyclotomic polynomial has exactly 9 nonzero terms.

21, 42, 63, 84, 126, 147, 168, 189, 252, 294, 336, 378, 441, 504, 567, 588, 672, 756, 882, 1008, 1029, 1134, 1176, 1323, 1344, 1512, 1701, 1764, 2016, 2058, 2268, 2352, 2646, 2688, 3024, 3087, 3402, 3528, 3969, 4032, 4116, 4536, 4704, 5103, 5292

Offset: 1

Author

Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 05 2003

Keywords

• nonn

Crossrefs

Cf. A086779.

Formula

{k : A051664(k) = 9}. - R. J. Mathar, Sep 15 2012