# A097791 (b-file synthesized from sequence entry)
0 1
1 10
2 65
3 360
4 1870
5 9476
6 47590
7 238280
8 1191895
9 5960190
10 29801951
11 149011120
12 745057420
13 3725289480
14 18626450460
15 93132256176
16 465661285725
17 2328306434610
18 11641532180365
19 58207660910680
20 291038304564026