# A118791 (b-file synthesized from sequence entry) 0 1 1 -1 2 3 3 2 4 -9 5 19 6 -6 7 36 8 -103 9 207 10 24 11 -180 12 650 13 -1605 14 3211 15 -120 16 1080 17 -4710 18 13860 19 -32191 20 64383 21 720 22 -7560 23 38640 24 -132300 25 351722 26 -790629 27 1581259 28 -5040 29 60480 30 -354480 31 1386000 32 -4163166 33 10433556 34 -22974463 35 45948927 36 40320 37 -544320 38 3598560 39 -15830640 40 53117064