# A148586 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 6
4 20
5 54
6 189
7 594
8 2143
9 7387
10 27380
11 100067
12 379944
13 1443052
14 5599659
15 21844255
16 86394133
17 343768974
18 1381731518
19 5584666966
20 22751462847
21 93150610255
22 383799188075
23 1588579086014
24 6608521212364
25 27608162197782
26 115812839302734
27 487692262398236
28 2060876813337521