# A191500 (b-file synthesized from sequence entry)
0 1
1 1
2 -1
3 -5
4 17
5 249
6 -1489
7 -27453
8 237537
9 6037041
10 -68649441
11 -2107439157
12 29789919345
13 1092524775081
14 -18492402857265
15 -781266357571053
16 15425010795541185
17 739391174869277025
18 -16695627953904545985
19 -893468264544135234405
20 22725280358984904476625