# A013339 (b-file synthesized from sequence entry)
0 1
1 0
2 -1
3 0
4 1
5 20
6 23
7 -140
8 -975
9 -1656
10 74751
11 365640
12 1284369
13 -26269412
14 -120532297
15 1518753340
16 37230940193
17 312855107472
18 -1646816770497
19 -37424409392880
20 -167334452580383
21 9798194248744356