# A013041 (b-file synthesized from sequence entry)
0 1
1 4
2 32
3 544
4 17536
5 997504
6 91956224
7 12588279552
8 2388796493824
9 598131709419520
10 190679121272193024
11 75328224099389177856
12 36099809995192945868800
13 20626251224635998952554496