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A028792 as a simple table

na(n)
13
26
37
412
514
615
717
824
927
1028
1129
1230
1333
1434
1535
1637
1739
1841
1943
2047
2148
2253
2354
2456
2557
2658
2759
2860
2961
3063
3166
3268
3369
3470
3571
3674
3775
3877
3978

[3,6,7,12,14,15,17,24,27,28,29,30,33,34,35,37,39,
 41,43,47,48,53,54,56,57,58,59,60,61,63,66,68,69,
 70,71,74,75,77,78]