# A009501 (b-file synthesized from sequence entry) 0 1 1 2 2 8 3 -288 4 -40192 5 -4910720 6 -708052992 7 -124294481920 8 -26387620528128 9 -6672448330104832 10 -1974770538516348928 11 -671428546188604407808 12 -256837533734311788806144 13 -107628558926352254017470464