Palindromes with exactly 3 palindromic prime factors (counted with multiplicity).

Terms

a(0) =8a(1) =44a(2) =66a(3) =99a(4) =242a(5) =343a(6) =363a(7) =404a(8) =606a(9) =909a(10) =1331a(11) =2222a(12) =2882a(13) =3333a(14) =5555a(15) =6886a(16) =7777a(17) =12221a(18) =15851a(19) =20402a(20) =26462a(21) =30603a(22) =37873a(23) =39693a(24) =112211a(25) =145541a(26) =167761a(27) =226622a(28) =248842a(29) =339933