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A275874 as a simple table

na(n)
40
58
621
740
866
9100
10143
11196
12260
13336
14425
15528
16646
17780
18931
191100
201288
211496
221725
231976
242250
252548
262871
273220
283596
294000
304433
314896
325390
335916
346475
357068
367696
378360
389061
399800
4010578
4111396
4212255
4313156
4414100
4515088
4616121
4717200
4818326
4919500
5020723
5121996

[0,8,21,40,66,100,143,196,260,336,425,528,646,780,
 931,1100,1288,1496,1725,1976,2250,2548,2871,3220,
 3596,4000,4433,4896,5390,5916,6475,7068,7696,8360,
 9061,9800,10578,11396,12255,13156,14100,15088,
 16121,17200,18326,19500,20723,21996]