Palindromic composite numbers with palindromic composite indices (in A002808).

Terms

a(0) =9a(1) =77a(2) =414a(3) =545a(4) =737a(5) =818a(6) =868a(7) =5005a(8) =9889a(9) =24642a(10) =45754a(11) =87478a(12) =974479a(13) =1774771a(14) =2735372a(15) =4085804a(16) =4549454a(17) =4658564a(18) =7673767a(19) =8541458a(20) =8671768a(21) =9251529a(22) =9478749a(23) =9642469a(24) =221131122a(25) =425393524a(26) =527111725a(27) =554535455a(28) =978909879a(29) =7476336747