A093108 Numbers n such that the Zsigmondy number Zs(n,4,1) differs from the n-th cyclotomic polynomial evaluated at 4.

3, 9, 10, 21, 27, 50, 55, 68, 78, 81, 147, 155, 171, 243, 250, 253, 301, 406, 410, 605, 657, 666, 729, 889, 979, 1014, 1029, 1081, 1156, 1250, 1378, 1582, 1711, 1830, 1962, 2056, 2187, 2211, 2265, 2328, 2485, 2892, 3081, 3249, 3403, 4082, 4658, 4805, 4965

Offset

1,1

Comments

A019322(n) does not equal A064080(n).

Links

Table of n, a(n) for n=1..49.

Mathematica

Select[Range[10000], GCD[#, Cyclotomic[#, 4]]!=1 &] (* Emmanuel Vantieghem, Nov 13 2016 *)

Crossrefs

Cf. A093107, A093106, A093109.

Sequence in context: A125237 A085459 A092169 * A247519 A344295 A077560

Adjacent sequences: A093105 A093106 A093107 * A093109 A093110 A093111

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