# A055156 (b-file synthesized from sequence entry)
0 3
1 9
2 81
3 243
4 2187
5 6561
6 59049
7 177147
8 1594323
9 4782969
10 43046721
11 129140163
12 1162261467
13 3486784401
14 31381059609
15 94143178827
16 847288609443
17 2541865828329
18 22876792454961
19 68630377364883
20 617673396283947