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A261228 as a simple table

na(n)
10
21
34
410
519
633
752
877
9108
10146
11190
12244
13306
14377
15458
16549
17652
18767
19896
201038
211195
221367
231554
241757
251978
262216
272472
282746
293040
303353
313688
324045
334423
344823
355247
365696
376169
386668
397193
407745
418324
428933
439570
4410236
4510934
4611663
4712423
4813215
4914042
5014902
5115797
5216726
5317693
5418695
5519734
5620811
5721928
5823083
5924278
6025513

[0,1,4,10,19,33,52,77,108,146,190,244,306,377,458,
 549,652,767,896,1038,1195,1367,1554,1757,1978,
 2216,2472,2746,3040,3353,3688,4045,4423,4823,5247,
 5696,6169,6668,7193,7745,8324,8933,9570,10236,
 10934,11663,12423,13215,14042,14902,15797,16726,
 17693,18695,19734,20811,21928,23083,24278,25513]