# A156073 (b-file synthesized from sequence entry) -1 1 0 2 1 5 2 20 3 130 4 1120 5 12080 6 156320 7 2360080 8 40721920 9 790465280 10 17048837120 11 404482209280 12 10468697374720 13 293526944276480 14 8863147657809920 15 286741939970836480 16 9895168120066539520 17 362814031120908615680 18 14085379571459949854720 19 577210378447729271111680