# A012927 (b-file synthesized from sequence entry) 0 0 1 2 2 -1 3 20 4 -54 5 932 6 -5670 7 99648 8 -1005704 9 19127984 10 -273119400 11 5764554528 12 -106046677968 13 2504052726944 14 -55986392252336 15 1478337150849408 16 -38674242587249280 17 1136792156499528448