# A148496 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 22
5 77
6 297
7 1158
8 4760
9 19615
10 83170
11 354235
12 1537155
13 6694459
14 29509806
15 130528377
16 582259997
17 2605232262
18 11727542598
19 52934218258
20 240011811917
21 1090827330717
22 4974968161528
23 22736645871636
24 104197523836178
25 478387995974963
26 2201255167550108
27 10145122325618120
28 46842914075663584