# A131763 (b-file synthesized from sequence entry)
0 1
1 3
2 21
3 183
4 1785
5 18651
6 204141
7 2310447
8 26819121
9 317530227
10 3819724293
11 46553474919
12 573608632233
13 7133530172619
14 89423593269213
15 1128765846337887
16 14334721079385441
17 183021615646831587
18 2347944226115977461
19 30250309354902101271
20 391241497991342192985