# A355768 (b-file synthesized from sequence entry) 0 1 1 1 2 -2 3 6 4 -28 5 260 6 -3948 7 71120 8 -1392368 9 29971008 10 -724981920 11 19800726528 12 -603571233120 13 20210951379840 14 -734663902256256 15 28785160833254400 16 -1210241780559067392 17 54390280325210271744 18 -2602745536670709682176 19 132118736078618372579328