# A009670 (b-file synthesized from sequence entry)
0 1
1 -2
2 -48
3 880
4 59136
5 -4558336
6 -358510592
7 87349164032
8 5261729398784
9 -4294386293800960
10 -9972473469599744
11 442881767885962739712
12 -50940651947982996897792
13 -83250857495799899292172288