Numbers n such that gcd(phi(n), n-1) > lambda(n).

Terms

a(0) =65a(1) =91a(2) =217a(3) =273a(4) =451a(5) =481a(6) =703a(7) =793a(8) =1281a(9) =1729a(10) =1891a(11) =1921a(12) =2465a(13) =2701a(14) =3201a(15) =4033a(16) =4097a(17) =4681a(18) =5833a(19) =6643a(20) =6697a(21) =7105a(22) =7161a(23) =8321a(24) =8401a(25) =8911a(26) =9073a(27) =10649a(28) =11041a(29) =11476