# A149726 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 17
4 75
5 289
6 1313
7 5581
8 25945
9 114835
10 540599
11 2453645
12 11667077
13 53909213
14 258252995
15 1208508337
16 5821455827
17 27500611031
18 133046370535
19 633165453019
20 3073897588439
21 14714918458313
22 71641305195307
23 344591510346845
24 1681643831688457
25 8120575130056213
26 39708177224041729
27 192383235475270681