Composite numbers whose concatenation of their aliquot parts, in descending order, is a palindrome.

Terms

a(0) =39a(1) =119a(2) =121a(3) =169a(4) =254a(5) =289a(6) =361a(7) =393a(8) =411a(9) =417a(10) =755a(11) =785a(12) =1211a(13) =1253a(14) =1703a(15) =2554a(16) =3503a(17) =3629a(18) =4197a(19) =6401a(20) =7555a(21) =10001a(22) =12131a(23) =12287a(24) =12439a(25) =14803a(26) =15563a(27) =17147a(28) =17363a(29) =23701