# A013400 (b-file synthesized from sequence entry)
0 -1
1 -7
2 -47
3 2529
4 474553
5 80543201
6 16320858097
7 4064194232641
8 1239800275237225
9 458973088380970433
10 203990713313188606561
11 107678055191713549688737
12 66805939165628021795993113