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A130509 as a simple table

na(n)
13
21
32
46
54
65
79
87
98
1012
1110
1211
1315
1413
1514
1618
1716
1817
1921
2019
2120
2224
2322
2423
2527
2625
2726
2830
2928
3029
3133
3231
3332
3436
3534
3635
3739
3837
3938
4042
4140
4241
4345
4443
4544
4648
4746
4847
4951
5049
5150
5254
5352
5453
5557
5655
5756
5860
5958
6059
6163
6261
6362
6466
6564
6665
6769
6867

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