# A293532 (b-file synthesized from sequence entry)
0 1
1 -1
2 1
3 -7
4 25
5 -181
6 1201
7 -10291
8 97777
9 -1013545
10 12202561
11 -151573951
12 2173233481
13 -31758579997
14 524057015665
15 -8838296029291
16 164416415570401
17 -3145357419120721
18 65057767274601217
19 -1391243470549894135
20 31671795881695430521
21 -747996624368605997701