# A012431 (b-file synthesized from sequence entry) 0 1 1 0 2 -12 3 360 4 -7280 5 -383040 6 89394624 7 -8970625664 8 -316692862720 9 470941672802304 10 -146844936720038912 11 18279034160407939072 12 9932590980055055503360 13 -8395139128320596309032960