# A191995 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 -2
4 14
5 -6
6 -406
7 2220
8 13768
9 -280224
10 501824
11 34875600
12 -394160416
13 -3296452368
14 129418793776
15 -532969950240
16 -35512135858048
17 654965382945408
18 5943454902108032
19 -395494767434053632
20 2913398252129581312