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A086512 as a simple table

na(n)
12
21
34
43
57
65
79
86
910
108
1112
1211
1319
1413
1517
1614
1716
1815
1921
2018
2122
2220
2324
2423
2531
2625
2727
2826
2930
3028
3132
3229
3335
3433
3545
3634
3744
3836
3942
4037
4143
4238
4352
4439
4555
4640
4750
4841
4957
5046
5166
5247
5351
5448
5560
5649
5753
5854
5964
6056
6158
6259
6367
6461
6565
6662
6772
6863
6973
7068
7188
7269

[2,1,4,3,7,5,9,6,10,8,12,11,19,13,17,14,16,15,21,
 18,22,20,24,23,31,25,27,26,30,28,32,29,35,33,45,
 34,44,36,42,37,43,38,52,39,55,40,50,41,57,46,66,
 47,51,48,60,49,53,54,64,56,58,59,67,61,65,62,72,
 63,73,68,88,69]