# A013328 (b-file synthesized from sequence entry)
0 0
1 1
2 0
3 0
4 -4
5 -8
6 0
7 -56
8 1136
9 -4976
10 47040
11 -541728
12 2460416
13 -51170624
14 202185984
15 -5359238912
16 20705351936
17 -673408564736
18 2215089472512
19 -100278515381760
20 202372883465216
21 -17008883052323840