# A137777 (b-file synthesized from sequence entry) 0 2 1 -2 2 4 3 2 4 -12 5 12 6 0 7 24 8 -72 9 48 10 -8 11 0 12 240 13 -480 14 240 15 0 16 -240 17 0 18 2400 19 -3600 20 1440 21 240 22 0 23 -5040 24 0 25 25200 26 -30240 27 10080 28 0 29 13440 30 0 31 -94080 32 0 33 282240 34 -282240 35 80640 36 -24192 37 0 38 483840 39 0 40 -1693440 41 0 42 3386880 43 -2903040 44 725760 45 0 46 -2177280 47 0 48 14515200 49 0 50 -30481920 51 0 52 43545600 53 -32659200