# A056385 (b-file synthesized from sequence entry)
1 6
2 30
3 120
4 720
5 2010
6 23820
7 46950
8 434700
9 1683450
10 15126810
11 36284466
12 547180200
13 1088416050
14 13060942950
15 58782162480
16 352913410080
17 1057916846190
18 16926687985950
19 33853322280030