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A287727 as a simple table

na(n)
11
23
34
45
56
68
79
810
912
1013
1114
1215
1317
1418
1519
1620
1722
1823
1924
2026
2127
2228
2329
2431
2532
2633
2735
2836
2937
3038
3140
3241
3342
3443
3545
3646
3747
3849
3950
4051
4152
4254
4355
4456
4557
4659
4760
4861
4963
5064
5165
5266
5368
5469
5570
5672
5773
5874
5975
6077
6178
6279
6380
6482
6583
6684

[1,3,4,5,6,8,9,10,12,13,14,15,17,18,19,20,22,23,
 24,26,27,28,29,31,32,33,35,36,37,38,40,41,42,43,
 45,46,47,49,50,51,52,54,55,56,57,59,60,61,63,64,
 65,66,68,69,70,72,73,74,75,77,78,79,80,82,83,84]