Greatest k such that phi(k) = phi(n), where phi is Euler's totient function.

Terms

a(0) =2a(1) =2a(2) =6a(3) =6a(4) =12a(5) =6a(6) =18a(7) =12a(8) =18a(9) =12a(10) =22a(11) =12a(12) =42a(13) =18a(14) =30a(15) =30a(16) =60a(17) =18a(18) =54a(19) =30a(20) =42a(21) =22a(22) =46a(23) =30a(24) =66a(25) =42a(26) =54a(27) =42a(28) =58a(29) =30