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A165513 as a simple table

na(n)
15
27
39
411
512
613
714
815
917
1018
1119
1220
1321
1422
1523
1624
1725
1826
1927
2029
2130
2231
2333
2434
2535
2636
2737
2838
2939
3040
3141
3242
3343
3444
3545
3646
3747
3848
3949
4050
4151
4252
4353
4454
4555
4656
4757
4858
4959
5060
5161
5262
5363
5465
5566
5667
5768
5869
5970
6071
6172
6273
6374
6475
6576
6677
6778
6879
6980
7081

[5,7,9,11,12,13,14,15,17,18,19,20,21,22,23,24,25,
 26,27,29,30,31,33,34,35,36,37,38,39,40,41,42,43,
 44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,
 60,61,62,63,65,66,67,68,69,70,71,72,73,74,75,76,
 77,78,79,80,81]