# A048980 (b-file synthesized from sequence entry)
0 1
1 1
2 0
3 -6
4 -36
5 -196
6 -724
7 7512
8 366838
9 11928316
10 421130508
11 14598816402
12 584642184936
13 25314953837836
14 1128885572358548
15 54492272309366314
16 2950485568862138250
17 213151926413154110951