# A087621 (b-file synthesized from sequence entry)
1 -1
2 2
3 4
4 -56
5 80
6 -352
7 64
8 2176
9 -4864
10 31232
11 -23552
12 -14336
13 217088
14 -2056192
15 2375680
16 -7307264
17 -4390912
18 102367232
19 -169607168
20 877133824
21 -397410304
22 -3042967552
23 9265217536
24 -68308434944
25 62495129600
26 -78483816448
27 -342993403904