A093107 Numbers n such that the Zsigmondy number Zs(n,3,1) differs from the n-th cyclotomic polynomial evaluated at 3.

2, 4, 8, 16, 20, 32, 39, 42, 55, 64, 100, 128, 253, 256, 272, 294, 328, 342, 500, 507, 512, 605, 610, 666, 812, 876, 930, 1024, 1081, 1474, 1711, 1806, 2048, 2058, 2485, 2500, 2756, 2943, 3088, 3403, 3502, 4096, 4624, 4656, 5671, 5819, 6162, 6498, 6591, 6655

Offset

1,1

Comments

A019321(n) does not equal A064079(n).

Links

Table of n, a(n) for n=1..50.

Mathematica

Select[Range[10000], GCD[#, Cyclotomic[#, 3]]!=1 &] (* Emmanuel Vantieghem, Nov 13 2016 *)

Crossrefs

Cf. A093106, A093108, A093109.

Sequence in context: A326750 A329561 A326752 * A125508 A067945 A309263

Adjacent sequences: A093104 A093105 A093106 * A093108 A093109 A093110

Keyword

nonn

Author

Ralf Stephan, Mar 20 2004

Extensions

More terms from Vladeta Jovovic, Apr 02 2004

Definition corrected by Jerry Metzger, Nov 04 2009

Status

approved