Odd numbers with exactly 2 distinct palindromic prime factors.

Terms

a(0) =15a(1) =21a(2) =33a(3) =35a(4) =55a(5) =77a(6) =303a(7) =393a(8) =453a(9) =505a(10) =543a(11) =573a(12) =655a(13) =707a(14) =755a(15) =905a(16) =917a(17) =939a(18) =955a(19) =1057a(20) =1059a(21) =1111a(22) =1119a(23) =1149a(24) =1267a(25) =1337a(26) =1441a(27) =1565a(28) =1661a(29) =1765