# A069182 (b-file synthesized from sequence entry) 1 2 2 -32 3 800 4 -35840 5 2508800 6 -246579200 7 32614400000 8 -5594021888000 9 1206137913344000 10 -319343506227200000 11 101868334198292480000 12 -38531929483929190400000 13 17052425131124169113600000 14 -8729129668569923688857600000 15 5117793695169522496962560000000