# A009391 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 3
4 -4
5 25
6 -61
7 427
8 -1184
9 12465
10 -49201
11 555731
12 -2361844
13 35135945
14 -191422141
15 2990414715
16 -17147588384
17 329655706465
18 -2289437638081
19 45692713833379
20 -329955144475204
21 7777794952988025
22 -65643617893832221