# A093364 (b-file synthesized from sequence entry)
1 0
2 1
3 2
4 6
5 6
6 30
7 150
8 210
9 210
10 210
11 13860
12 13860
13 60060
14 420420
15 4144140
16 9699690
17 87297210
18 717777060
19 4180566390
20 18846497670
21 26004868890