# A148570 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 6
4 19
5 52
6 177
7 572
8 2084
9 7356
10 28195
11 105124
12 417624
13 1619699
14 6604938
15 26401947
16 109851101
17 449617572
18 1901123505
19 7928975462
20 33972903518
21 143863241757
22 623248679117
23 2672552178002
24 11686567394545
25 50642455771423
26 223218947010424
27 975963035154683
28 4331396484379463