# A009532 (b-file synthesized from sequence entry)
0 0
1 1
2 0
3 -4
4 12
5 -39
6 180
7 -1002
8 6328
9 -44843
10 351720
11 -3010536
12 27741780
13 -271232571
14 2763421388
15 -28565959606
16 284847059760
17 -2385962778423
18 5704285264272
19 489538579791348
20 -19920957108600740
21 598894765796765521