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A271863 as a simple table

na(n)
11
22
34
43
58
66
77
810
912
105
1111
1219
1316
1414
1518
1615
1722
1825
1917
209
2124
2213
2329
2423
2532
2628
2726
2831
2927
3039
3120
3238
3340
3433
3535
3630
3734
3849
3936
4046
4137
4221
4345
4443
4548
4644
4751
4859
4941
5056
5142
5250
5355
5453
5558
5654
5767
5862
5970
6064
6157
6265
6363
6452
6560
6669
6747

[1,2,4,3,8,6,7,10,12,5,11,19,16,14,18,15,22,25,17,
 9,24,13,29,23,32,28,26,31,27,39,20,38,40,33,35,30,
 34,49,36,46,37,21,45,43,48,44,51,59,41,56,42,50,
 55,53,58,54,67,62,70,64,57,65,63,52,60,69,47]