# A155590 (b-file synthesized from sequence entry)
0 1
1 8
2 52
3 350
4 2416
5 16838
6 117712
7 823670
8 5765056
9 40354118
10 282476272
11 1977328790
12 13841291296
13 96889018598
14 678223089232
15 4747561542710
16 33232930635136
17 232630514118278
18 1628413598172592
19 11398895185897430