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

Author

Ralf Stephan, Mar 20 2004

Keywords

• nonn

Comments

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

Crossrefs

Cf. A093106, A093108, A093109.

Programs

Mathematica

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

Extensions

More terms from Vladeta Jovovic, Apr 02 2004

Definition corrected by Jerry Metzger, Nov 04 2009