# A076743 (b-file synthesized from sequence entry) 0 1 1 -2 2 6 3 -2 4 -24 5 24 6 120 7 -240 8 24 9 -720 10 2400 11 -720 12 5040 13 -25200 14 15120 15 -720 16 -40320 17 282240 18 -282240 19 40320 20 362880 21 -3386880 22 5080320 23 -1451520 24 40320 25 -3628800 26 43545600 27 -91445760 28 43545600 29 -3628800 30 39916800 31 -598752000 32 1676505600