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A181899 as a simple table

na(n)
42
55
612
735
896
9288
10945
113150
1210800
1339312
14147420
15571536
162286144
179424800
1839984000
19174283200
20779688000
213573570000
2216761064320
2380379048750
24393826406400
251969132032000
2610040487256800
2752174220175000
28276080056560000
291486750296281250

[2,5,12,35,96,288,945,3150,10800,39312,147420,
 571536,2286144,9424800,39984000,174283200,
 779688000,3573570000,16761064320,80379048750,
 393826406400,1969132032000,10040487256800,
 52174220175000,276080056560000,1486750296281250]