# A337292 (b-file synthesized from sequence entry)
1 5
2 20
3 130
4 1020
5 8855
6 81900
7 791120
8 7887660
9 80560285
10 838553320
11 8863227100
12 94871786100
13 1026317094705
14 11203116342560
15 123243929011680
16 1364973221797900
17 15207477517956825
18 170321264840835900
19 1916512328325665070
20 21655893753689280120