# A137648 (b-file synthesized from sequence entry)
0 1
1 1
2 7
3 108
4 2612
5 85298
6 3501504
7 172989880
8 9987924928
9 659768790882
10 49065577842538
11 4056413252138692
12 369030922581806616
13 36634832808175143734
14 3940779041158898056286
15 456592594401713997379344