# A148131 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 11
5 27
6 88
7 251
8 865
9 2647
10 9625
11 31124
12 117187
13 394565
14 1521086
15 5271938
16 20758265
17 73741969
18 294723790
19 1067134981
20 4321252882
21 15901492296
22 65085037328
23 242796852919
24 1002700099800
25 3784053269508
26 15751175996564
27 60050158574561
28 251634551218974
29 967830162075301
30 4079842369899290