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A328548 as a simple table

na(n)
01
12
25
310
420
536
663
7106
8175
9280
10441
11680
121034
131548
142290
153346
164840
176930
189837
1913844
2019337
2126810
2236925
2350530
2468741
2592984
26125113
27167490
28223155
29295960
30390825
31513954
32673214
33878480
341142190
351479892
361911051
372459896
383156602

[1,2,5,10,20,36,63,106,175,280,441,680,1034,1548,
 2290,3346,4840,6930,9837,13844,19337,26810,36925,
 50530,68741,92984,125113,167490,223155,295960,
 390825,513954,673214,878480,1142190,1479892,
 1911051,2459896,3156602]