# A009412 (b-file synthesized from sequence entry)
0 0
1 1
2 -1
3 5
4 -12
5 29
6 -165
7 993
8 -7056
9 58617
10 -520065
11 5139485
12 -56499564
13 676947413
14 -8785333557
15 122824831353
16 -1839706861440
17 29397288124913
18 -499197383688033
19 8976479629200565
20 -170396114982640300
21 3405066284386654349