Squarefree nonprimes with property that the concatenation of the prime factors is a palindrome.

Terms

a(0) =1a(1) =39a(2) =69a(3) =119a(4) =129a(5) =159a(6) =219a(7) =249a(8) =259a(9) =329a(10) =339a(11) =403a(12) =429a(13) =469a(14) =669a(15) =679a(16) =795a(17) =1207a(18) =1309a(19) =1329a(20) =1533a(21) =1547a(22) =1589a(23) =1703a(24) =2319a(25) =2321a(26) =2359a(27) =2649a(28) =2701a(29) =3039