# A012230 (b-file synthesized from sequence entry) 0 1 1 -1 2 21 3 -1101 4 109001 5 -17491001 6 4139085981 7 -1355308485701 8 586612833746961 9 -324261948714025201 10 222851423174495787941 11 -186365710421614910029501 12 186332939048243649892744921