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A179439 as a simple table

na(n)
12
23
34
45
56
68
79
810
911
1012
1113
1214
1315
1417
1520
1621
1722
1824
1925
2026
2127
2229
2330
2433
2534
2635
2736
2837
2938
3039
3140
3241
3342
3443
3544
3645
3746
3848
3949
4050
4151
4252
4353
4454
4555
4656
4757
4858
4959
5061
5162
5264
5365
5466
5567
5668
5769
5870
5971
6072
6173
6275
6376
6477
6578
6679
6780
6881
6982
7083
7184
7285

[2,3,4,5,6,8,9,10,11,12,13,14,15,17,20,21,22,24,
 25,26,27,29,30,33,34,35,36,37,38,39,40,41,42,43,
 44,45,46,48,49,50,51,52,53,54,55,56,57,58,59,61,
 62,64,65,66,67,68,69,70,71,72,73,75,76,77,78,79,
 80,81,82,83,84,85]