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A320381 as a simple table

na(n)
00
11
25
37
415
518
638
743
881
9101
10164
11206
12332
13405
14613
15783
161115
171410
181984
192483
203402
214281
225697
237147
249417
2511702
2615167
2718861
2824093
2929782
3037745
3146377
3258206
3371325
3488665
35108194
36133675
37162278
38199154
39241040
40293934
41354306
42429968
43516256

[0,1,5,7,15,18,38,43,81,101,164,206,332,405,613,
 783,1115,1410,1984,2483,3402,4281,5697,7147,9417,
 11702,15167,18861,24093,29782,37745,46377,58206,
 71325,88665,108194,133675,162278,199154,241040,
 293934,354306,429968,516256]