A262537 Bisection of A262310.
1, 1, 9, 49, 57, 2401, -9063, -153502, -755943, -767039, -40127031, -58813391, -1696965207, -4483997699, 105920054242, -203398909151, 555306094297, -2817291378419, 5514657953337, 442400619060589, -739096098204743, -69507309377825326, -90124818751960951
Offset: 0