Numbers k > 1 such that sigma(phi(k))/sigma(k) > sigma(phi(j))/sigma(j) for all 1 < j < k.

Terms

a(0) =2a(1) =3a(2) =5a(3) =7a(4) =13a(5) =31a(6) =37a(7) =61a(8) =181a(9) =241a(10) =421a(11) =1009a(12) =1201a(13) =1321a(14) =1801a(15) =2161a(16) =2521a(17) =7561a(18) =12601a(19) =15121a(20) =30241a(21) =55441a(22) =110881a(23) =278263a(24) =332641a(25) =555911a(26) =666917a(27) =722473a(28) =1443853a(29) =2165407