# A148907 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 32
5 105
6 435
7 1585
8 6847
9 26144
10 117306
11 463831
12 2121051
13 8617173
14 39898701
15 165430592
16 773730816
17 3259812284
18 15362861588
19 65556570624
20 310851161790
21 1340058237363
22 6387804534749
23 27768944728870
24 132962273058794
25 582137554477254
26 2797765925822252
27 12324977210307510
28 59420187901561334