# A012186 (b-file synthesized from sequence entry) 0 1 1 -2 2 24 3 -888 4 60672 5 -6741888 6 1108807296 7 -252757302528 8 76277556436992 9 -29437978293841920 10 14141695133810196480 11 -8275095832054525329408 12 5794473015450853604229120