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A248027 as a simple table

na(n)
10
20
30
44
569
6554
73100
813288
947492
10147050
11407568
121030912
132419025
145324684
1511099416
1622065120
1742085344
1877378556
19137705904
20237996060
21400624581
22658434694
231058839380
241669118984
252583424948
263931632406
275890783808
288699293304
2912674960961

[0,0,0,4,69,554,3100,13288,47492,147050,407568,
 1030912,2419025,5324684,11099416,22065120,
 42085344,77378556,137705904,237996060,400624581,
 658434694,1058839380,1669118984,2583424948,
 3931632406,5890783808,8699293304,12674960961]