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

A279011

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

Terms

    a(0) =1a(1) =2a(2) =12a(3) =152a(4) =222a(5) =268a(6) =362a(7) =432a(8) =723a(9) =992a(10) =1517a(11) =2532a(12) =2567a(13) =8472a(14) =9718a(15) =9858a(16) =13498a(17) =15738a(18) =34732a(19) =35898a(20) =44092a(21) =60363a(22) =69312a(23) =75168a(24) =75973a(25) =82752a(26) =87208a(27) =88888a(28) =98198a(29) =105852

External references