Numbers n such that the n-th cyclotomic polynomial has a root mod 7.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =7a(5) =14a(6) =21a(7) =42a(8) =49a(9) =98a(10) =147a(11) =294a(12) =343a(13) =686a(14) =1029a(15) =2058a(16) =2401a(17) =4802a(18) =7203a(19) =14406a(20) =16807a(21) =33614a(22) =50421a(23) =100842a(24) =117649a(25) =235298a(26) =352947a(27) =705894a(28) =823543a(29) =1647086