# A009446 (b-file synthesized from sequence entry)
0 1
1 -4
2 36
3 -848
4 23824
5 -871872
6 44942912
7 -2860930816
8 213856723200
9 -19099352929280
10 2010469524579328
11 -242177953175506944
12 32998102512641970176
13 -5069553933584348397568
14 870871673923373487243264