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A261728 as a simple table

na(n)
11
23
34
46
52
69
77
812
910
1015
115
1218
1313
1421
1516
1624
178
1827
1919
2030
2122
2233
2311
2436
2525
2639
2728
2842
2914
3045
3131
3248
3334
3451
3517
3654
3737
3857
3940
4060
4120
4263
4343
4466
4546
4669
4723
4872
4949
5075
5152
5278
5326
5481
5555
5684
5758
5887
5929
6090
6161
6293
6364
6496
6532
6699
6767
68102
6970
70105
7135
72108
7373
74111
7576
76114
7738
78117
7979

[1,3,4,6,2,9,7,12,10,15,5,18,13,21,16,24,8,27,19,
 30,22,33,11,36,25,39,28,42,14,45,31,48,34,51,17,
 54,37,57,40,60,20,63,43,66,46,69,23,72,49,75,52,
 78,26,81,55,84,58,87,29,90,61,93,64,96,32,99,67,
 102,70,105,35,108,73,111,76,114,38,117,79]