# A148881 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 30
5 96
6 403
7 1466
8 6439
9 25426
10 114604
11 476405
12 2187128
13 9410849
14 43797442
15 193201730
16 908410384
17 4083431156
18 19351522407
19 88275335700
20 420946248654
21 1942836289306
22 9311177087202
23 43384912071474
24 208788198483504
25 980475447765973
26 4734900305936681
27 22380831968092385
28 108399898901413396