# A012820 (b-file synthesized from sequence entry)
0 1
1 -1
2 -11
3 -37
4 7145
5 450711
6 -3070179
7 -4923539597
8 -586954253103
9 57287087552943
10 41119408518068293
11 5965331366096594059
12 -2749345524263504663367
13 -1905635088547220040309433