Sum of composite numbers up to n is palindromic.

Terms

a(0) =4a(1) =34a(2) =36a(3) =215a(4) =258a(5) =288a(6) =1711a(7) =2785a(8) =3708a(9) =4572a(10) =4873a(11) =18986a(12) =29509a(13) =42005a(14) =45534a(15) =234272a(16) =411232a(17) =2074123a(18) =2225480a(19) =2841251a(20) =3728941a(21) =4590401a(22) =17643216a(23) =72349270a(24) =176262062a(25) =219311147a(26) =426454179a(27) =444875288a(28) =1457527586