# A098656 (b-file synthesized from sequence entry)
0 0
1 1
2 -2
3 4
4 -24
5 16
6 -224
7 64
8 -1920
9 256
10 -15872
11 1024
12 -129024
13 4096
14 -1040384
15 16384
16 -8355840
17 65536
18 -66977792
19 262144
20 -536346624
21 1048576
22 -4292870144
23 4194304
24 -34351349760
25 16777216
26 -274844352512
27 67108864
28 -2198889037824
29 268435456
30 -17591649173504
31 1073741824