# A081103 (b-file synthesized from sequence entry)
0 0
1 1
2 -4
3 18
4 -95
5 584
6 -4123
7 32969
8 -294992
9 2922956
10 -31791716
11 376719892
12 -4832017320
13 66713229192
14 -986611705584
15 15561976320144
16 -260804276106624
17 4628322010931328
18 -86710491660063744
19 1710290952899283456
20 -35427639035553292800
21 768970029545198092800