# A274294 (b-file synthesized from sequence entry)
0 3
1 6
2 16
3 50
4 234
5 1582
6 13376
7 130986
8 1441810
9 17572214
10 234662352
11 3405357826
12 53334454586
13 896324308830
14 16083557845504
15 306827170866362
16 6199668952527906
17 132240988644216166
18 2968971263911289360
19 69974827707903049554
20 1727194482044146637962