# A097474 (b-file synthesized from sequence entry) 0 1 1 -1 2 6 3 2 4 -10 5 10 6 -17 7 84 8 -70 9 28 10 124 11 -612 12 504 13 -168 14 36 15 -2764 16 13640 17 -11220 18 3696 19 -660 20 88 21 43688 22 -215592 23 177320 24 -58344 25 10296 26 -1144 27 104 28 -1859138 29 9174480 30 -7545720 31 2482480 32 -437580 33 48048 34 -3640 35 240 36 51236656 37 -252842768 38 207954880 39 -68414528 40 12057760 41 -1322464 42 99008 43 -5440