URL: https://oeis.org/A009366/b009366.txt
# A009366 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 6
4 -22
5 176
6 -1192
7 12240
8 -122288
9 1561088
10 -20588544
11 318007808
12 -5193155328
13 94807748608
14 -1841205505024
15 38942692972544
16 -875204314126336
17 21088169713729536
18 -537861879179575296
19 14558790290337431552
