# A257286 (b-file synthesized from sequence entry)
0 1
1 10
2 80
3 580
4 3980
5 26380
6 170780
7 1087180
8 6835580
9 42575980
10 263268380
11 1618672780
12 9907349180
13 60420657580
14 367406757980
15 2228854610380
16 13495197974780
17 81581539411180
18 492540994279580
19 2970504754739980
20 17899322473752380