Sum of odd composites up to n is palindromic.

Terms

a(0) =9a(1) =55a(2) =99a(3) =215a(4) =357a(5) =663a(6) =3725a(7) =6321a(8) =26999a(9) =191363a(10) =675861a(11) =4073533a(12) =4180943a(13) =5540147a(14) =6531789a(15) =400974175a(16) =4248550291a(17) =6224149881a(18) =17109266357a(19) =38023877981a(20) =55995454633a(21) =62836534343a(22) =212955815417