# A148399 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 16
5 54
6 192
7 720
8 2703
9 10516
10 41705
11 168001
12 689349
13 2859808
14 12006070
15 50816519
16 217011153
17 932736893
18 4035832654
19 17565418331
20 76834165053
21 337790073171
22 1491128371657
23 6609622369168
24 29400175070022
25 131221249915403
26 587446331571253
27 2637383430625903
28 11872227572864716