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A281970 as a simple table

na(n)
01
12
26
315
434
571
6134
7238
8405
9660
101030
111559
122310
133336
144691
156500
168886
1711899
1815709
1920584
2026624
2133926
2242974
2354080
2467172
2582800
26101787
27124031
28149660
29180251
30216171
31256730
32303737
33359036
34421356
35491196
36572792
37665539
38767239
39883380

[1,2,6,15,34,71,134,238,405,660,1030,1559,2310,
 3336,4691,6500,8886,11899,15709,20584,26624,33926,
 42974,54080,67172,82800,101787,124031,149660,
 180251,216171,256730,303737,359036,421356,491196,
 572792,665539,767239,883380]