# A016247 (b-file synthesized from sequence entry)
0 1
1 18
2 241
3 2910
4 33565
5 378546
6 4219993
7 46755846
8 516329845
9 5691721530
10 62681496241
11 689931815118
12 7591862105101
13 83526155988930
14 918881752875145
15 10108263503608086
16 111194283871577893
17 1223157434578690506