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A131393 as a simple table

na(n)
11
22
34
43
56
610
78
85
911
107
1112
1219
1314
1422
1516
169
1718
1828
1920
2031
2121
2233
2324
2413
2526
2640
2727
2842
2930
3015
3132
3248
3334
3417
3535
3654
3738
3858
3939
4060
4137
4259
4341
4464
4544
4623
4747
4825
4950
5076
5152
5279
5353
5481
5556
5629
5761
5890
5962
6092
6163
6294
6357
6491
6555
6688
6749
6884
6951
7087
7146
7283

[1,2,4,3,6,10,8,5,11,7,12,19,14,22,16,9,18,28,20,
 31,21,33,24,13,26,40,27,42,30,15,32,48,34,17,35,
 54,38,58,39,60,37,59,41,64,44,23,47,25,50,76,52,
 79,53,81,56,29,61,90,62,92,63,94,57,91,55,88,49,
 84,51,87,46,83]