# A024280 (b-file synthesized from sequence entry)
0 0
1 1
2 8
3 16
4 -9472
5 -1073024
6 -73802752
7 6179501056
8 4687080685568
9 1381417658515456
10 171579748064165888
11 -115606987957684404224
12 -118208590165253073928192
13 -59168959906143078642089984