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A293476 as a simple table

na(n)
00
115
2180
31050
44200
513230
635280
783160
8178200
9353925
10660660
111171170
121987440
133248700
145140800
157907040
1611860560
1717398395
1825017300
1935331450
2049092120
2167209450
2290776400
23121095000
24159705000
25208415025
26269336340
27344919330
28437992800
29551806200

[0,15,180,1050,4200,13230,35280,83160,178200,
 353925,660660,1171170,1987440,3248700,5140800,
 7907040,11860560,17398395,25017300,35331450,
 49092120,67209450,90776400,121095000,159705000,
 208415025,269336340,344919330,437992800,551806200]