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

%I #13 Nov 13 2016 14:43:49

%S 2,4,8,16,20,32,39,42,55,64,100,128,253,256,272,294,328,342,500,507,

%T 512,605,610,666,812,876,930,1024,1081,1474,1711,1806,2048,2058,2485,

%U 2500,2756,2943,3088,3403,3502,4096,4624,4656,5671,5819,6162,6498,6591,6655

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

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

%t Select[Range[10000], GCD[#, Cyclotomic[#, 3]]!=1 &] (* _Emmanuel Vantieghem_, Nov 13 2016 *)

%Y Cf. A093106, A093108, A093109.

%K nonn

%O 1,1

%A _Ralf Stephan_, Mar 20 2004

%E More terms from _Vladeta Jovovic_, Apr 02 2004

%E Definition corrected by _Jerry Metzger_, Nov 04 2009