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A248016 as a simple table

na(n)
10
20
33
416
567
6204
7546
81268
92714
105348
119965
1217580
1329781
1448520
1576660
16117624
17176196
18257976
19370503
20522456
21725175
22991540
231337974
241782924
252349438
263063164
273955601
285061524
296423017
308086224
3110106280
3212543280
3315468232
3418958128
3523103051
3628000224
3733762411
3840510812
3948384906
4057534052

[0,0,3,16,67,204,546,1268,2714,5348,9965,17580,
 29781,48520,76660,117624,176196,257976,370503,
 522456,725175,991540,1337974,1782924,2349438,
 3063164,3955601,5061524,6423017,8086224,10106280,
 12543280,15468232,18958128,23103051,28000224,
 33762411,40510812,48384906,57534052]