Numbers k such that phi(6k) = phi(6k-2), where phi is Euler's totient function A000010.

Terms

a(0) =1a(1) =2a(2) =12a(3) =152a(4) =222a(5) =362a(6) =432a(7) =992a(8) =1517a(9) =2532a(10) =2567a(11) =8472a(12) =34732a(13) =44092a(14) =69312a(15) =82752a(16) =105852a(17) =114392a(18) =128672a(19) =336992a(20) =350082a(21) =393132a(22) =393552a(23) =462747a(24) =497712a(25) =559872a(26) =665817a(27) =714502a(28) =931432a(29) =968952