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A390246 as a simple table

na(n)
12
23
34
46
56
69
79
811
913
1015
1115
1217
1316
1419
1520
1625
1724
1827
1926
2029
2130
2231
2330
2433
2536
2638
2740
2843
2942
3046
3145
3250
3349
3448
3550
3655
3754
3855
3958
4060
4159
4261
4360
4462
4566
4667
4766
4873
4972
5077
5176
5279
5378
5482
5582
5689
5788
5887
5986
6091
6190
6289
6398
64105
65104
66103

[2,3,4,6,6,9,9,11,13,15,15,17,16,19,20,25,24,27,
 26,29,30,31,30,33,36,38,40,43,42,46,45,50,49,48,
 50,55,54,55,58,60,59,61,60,62,66,67,66,73,72,77,
 76,79,78,82,82,89,88,87,86,91,90,89,98,105,104,
 103]