Numbers k such that the k-th cyclotomic polynomial evaluated at 2 (=A019320(k)) is not coprime to k.

A093106

Numbers k such that the k-th cyclotomic polynomial evaluated at 2 (=A019320(k)) is not coprime to k.

Terms

    a(0) =6a(1) =18a(2) =20a(3) =21a(4) =54a(5) =100a(6) =110a(7) =136a(8) =147a(9) =155a(10) =156a(11) =162a(12) =253a(13) =342a(14) =486a(15) =500a(16) =602a(17) =657a(18) =812a(19) =820a(20) =889a(21) =979a(22) =1029a(23) =1081a(24) =1210a(25) =1332a(26) =1458a(27) =2028a(28) =2265a(29) =2312

External references