# A164985 (b-file synthesized from sequence entry)
0 1
1 6
2 27
3 405
4 1458
5 5103
6 59049
7 196830
8 649539
9 6908733
10 22320522
11 71744535
12 731794257
13 2324522934
14 7360989291
15 73222472421
16 230127770466
17 721764371007
18 7060738412025
19 22029503845518
20 68630377364883
21 663426981193869