# A012786 (b-file synthesized from sequence entry) 0 1 1 2 2 -12 3 -432 4 10000 5 1500512 6 -18269760 7 -16350361856 8 922523568384 9 990634832194048 10 92553699220882432 11 -44373953423964778496 12 9057208032779104423936 13 25540436414796388855898112