# A174313 (b-file synthesized from sequence entry)
0 1
1 6
2 18
3 54
4 162
5 474
6 1398
7 4074
8 11898
9 34554
10 100302
11 290322
12 839382
13 2422626
14 6984342
15 20110806
16 57851358
17 166258242
18 477419658
19 1369878582
20 3927963138
21 11255743434
22 32235116502
23 92267490414
24 263968559874
25 754837708494
26 2157584748150
27 6164626128066
28 17606866229010