# A149278 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 42
5 156
6 623
7 2562
8 10775
9 46314
10 202193
11 894617
12 4001675
13 18074562
14 82287790
15 377248774
16 1740375992
17 8071596078
18 37613773364
19 176041132719
20 827032930155
21 3898722302211
22 18437091951270
23 87434285061334
24 415710323685474
25 1981238899857338
26 9462805005034546
27 45286663139423310