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A161873 as a simple table

na(n)
12
23
35
46
57
68
711
812
913
1014
1115
1217
1321
1422
1523
1624
1726
1827
1928
2031
2132
2233
2335
2438
2539
2640
2742
2843
2944
3045
3146
3247
3348
3450
3551
3652
3754
3856
3957
4058
4159
4261
4362
4463
4565
4666
4767
4869
4970
5071
5172
5274
5375
5476
5577
5678
5779
5880
5982
6083
6184
6286
6387
6488
6589

[2,3,5,6,7,8,11,12,13,14,15,17,21,22,23,24,26,27,
 28,31,32,33,35,38,39,40,42,43,44,45,46,47,48,50,
 51,52,54,56,57,58,59,61,62,63,65,66,67,69,70,71,
 72,74,75,76,77,78,79,80,82,83,84,86,87,88,89]