# A013399 (b-file synthesized from sequence entry)
0 -1
1 -7
2 -47
3 2809
4 506893
5 83115485
6 16337883105
7 3980912553745
8 1198885514196949
9 441311715413932261
10 196017910100566581641
11 103733615818680354449241
12 64634094120174715384992573