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A097371 as a simple table

na(n)
150
2210
3450
4780
51500
63920
716500
891728
9269500
10493920
111293600
12266378112
13317447424
141277337600
1514948388000
1648697248600
17379748636467200

[50,210,450,780,1500,3920,16500,91728,269500,
 493920,1293600,266378112,317447424,1277337600,
 14948388000,48697248600,379748636467200]