# A009713 (b-file synthesized from sequence entry)
0 1
1 2
2 8
3 -176
4 -16384
5 -969728
6 -32455680
7 4303626240
8 1468506210304
9 269552004300800
10 24649152071991296
11 -7396863878894714880
12 -5630959968640999358464
13 -2114449853843696991076352