Palindromic composite numbers with only palindromic prime factors.

Terms

a(0) =4a(1) =6a(2) =8a(3) =9a(4) =22a(5) =33a(6) =44a(7) =55a(8) =66a(9) =77a(10) =88a(11) =99a(12) =121a(13) =202a(14) =242a(15) =252a(16) =262a(17) =303a(18) =343a(19) =363a(20) =393a(21) =404a(22) =484a(23) =505a(24) =525a(25) =606a(26) =616a(27) =626a(28) =686a(29) =707