# A012952 (b-file synthesized from sequence entry)
0 1
1 -4
2 -8
3 26
4 4008
5 288486
6 23670420
7 2395713498
8 304636017840
9 49472656345230
10 10516377983584300
11 2991272711709675554
12 1135988864475032518984
13 557539993775779096522774