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A027803 as a simple table

na(n)
335
4350
51890
67350
723100
862370
9150150
10330330
11675675
121301300
132382380
144176900
157054320
1611531100
1718314100
1828352940
1942902475
2063596610
2192534750
22132382250
23186486300
24259008750
25355077450
26480957750
27644245875

[35,350,1890,7350,23100,62370,150150,330330,
 675675,1301300,2382380,4176900,7054320,11531100,
 18314100,28352940,42902475,63596610,92534750,
 132382250,186486300,259008750,355077450,480957750,
 644245875]