# A148808 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 26
5 84
6 315
7 1155
8 4479
9 17879
10 72237
11 298920
12 1254329
13 5323120
14 22882116
15 99271167
16 434160320
17 1915240840
18 8499435683
19 37968001495
20 170538467281
21 769755420661
22 3491044143734
23 15897506282629
24 72677164291744
25 333440276296060
26 1534802275386455
27 7086364716511872
28 32811176928714466