# A047830 (b-file synthesized from sequence entry)
0 2
1 4
2 14
3 26
4 62
5 134
6 393
7 1774
8 13682
9 41037
10 167073
11 334142
12 4677862
13 14033577
14 79464886
15 476789307
16 3488435822
17 34884358195