Numbers n for which there are exactly six k such that n = k + reverse(k).

Terms

a(0) =66a(1) =143a(2) =606a(3) =626a(4) =646a(5) =666a(6) =686a(7) =706a(8) =726a(9) =746a(10) =766a(11) =786a(12) =1313a(13) =1333a(14) =1353a(15) =1373a(16) =1393a(17) =1413a(18) =1433a(19) =1453a(20) =1473a(21) =1493a(22) =1551a(23) =2222a(24) =2431a(25) =3113a(26) =3762a(27) =4873a(28) =6006a(29) =7986