Nontrivial palindromes k such that phi(k) is also a palindrome.

Terms

a(0) =535a(1) =767a(2) =20502a(3) =50805a(4) =53035a(5) =58085a(6) =58585a(7) =59395a(8) =82428a(9) =88188a(10) =3269623a(11) =5808085a(12) =5846485a(13) =8110118a(14) =8666668a(15) =8818188a(16) =8872788a(17) =8875788a(18) =473040374a(19) =515050515a(20) =530303035a(21) =535353535a(22) =580303085a(23) =580858085a(24) =581585185a(25) =585797585