# A354411 (b-file synthesized from sequence entry)
1 2
2 6
3 30
4 210
5 43890
6 510510
7 510510
8 3967173210
9 134748093480
10 530514844860
11 4201942828713630
12 1706257740074998110
13 125050509312845636520
14 511284700554162118403820
15 2695009287439086535873235280
16 206794067314254446263154097180
17 86753583273488685998907289046220