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A141658 as a simple table

na(n)
12
23
32
45
54
63
77
86
95
103
1111
1210
139
146
1510
1613
1712
1811
199
2012
2112
2217
2316
2415
2513
2616
2716
2814
2919
3018
3117
3215
3318
3418
3516
3614
3723
3822
3921
4019
4122
4222
4320
4418
4522
4629
4728
4827
4925
5028
5128
5226
5324
5428
5527
5631
5730
5829
5927
6030
6130
6228
6326
6430
6529
6628

[2,3,2,5,4,3,7,6,5,3,11,10,9,6,10,13,12,11,9,12,
 12,17,16,15,13,16,16,14,19,18,17,15,18,18,16,14,
 23,22,21,19,22,22,20,18,22,29,28,27,25,28,28,26,
 24,28,27,31,30,29,27,30,30,28,26,30,29,28]