# A093760 (b-file synthesized from sequence entry)
2 4
3 256
4 2048
5 4194304
6 54525952
7 134754598912
8 4797478469632
9 281474976710656
10 6757369765892718592
11 745800601892181508096
12 15816641891325181952
13 198634540185704451801088