# A097371 (b-file synthesized from sequence entry)
1 50
2 210
3 450
4 780
5 1500
6 3920
7 16500
8 91728
9 269500
10 493920
11 1293600
12 266378112
13 317447424
14 1277337600
15 14948388000
16 48697248600
17 379748636467200