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A206495 as a simple table

na(n)
12
23
34
45
56
67
76
86
98
1010
1111
1213
1317
149
1510
1612
1714
1813
1913
2014
2119
2212
2312
2412
2516
2615
2715
2818
2921
3021
3115
3220
3322
3426
3534
3622
3729
3831
3941
4059
4118
4218
4320
4424
4528
4623
4726
4829
4937
5043
5121
5226
5326
5428
5538
5625
5730
5833
5935
6039
6151
6224
6324
6424
6524
6632
6734
6841
6941
7043
7167
7227
7330
7430
7536
7642
7742
7837
7937
8037
8138
8253
8330
8430
8540
8644
8752
8868

[2,3,4,5,6,7,6,6,8,10,11,13,17,9,10,12,14,13,13,
 14,19,12,12,12,16,15,15,18,21,21,15,20,22,26,34,
 22,29,31,41,59,18,18,20,24,28,23,26,29,37,43,21,
 26,26,28,38,25,30,33,35,39,51,24,24,24,24,32,34,
 41,41,43,67,27,30,30,36,42,42,37,37,37,38,53,30,
 30,40,44,52,68]