# A099931 (b-file synthesized from sequence entry)
4 1
5 29
6 1015
7 34307
8 1166438
9 39618670
10 1345902818
11 45720876202
12 1553165059215
13 52761884311059
14 1792350941301921
15 60887169888069525
16 2068371426604585180
17 70263741326790571820
18 2386898833730186862100