# A012256 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 -3
4 -15
5 41
6 561
7 -1019
8 -38623
9 12305
10 4206881
11 7478221
12 -661302639
13 -3005647943
14 140958927825
15 1143787246421
16 -38921417469119
17 -494108406644959
18 13433349471318337
19 250135591701350045