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A239664 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1123
1211
1320
1413
1522
1615
1726
1817
1924
2019
2125
2214
2327
2416
2529
2618
2735
2812
2937
3021
3134
3255
3328
3431
3540
3633
3741
3830
3947
4032
4145
4238
4349
4436
4559
4642
4753
4844
4939
5046
5151
5243
5350
5461
5548
5665
5771
5852
5963
6058
6167
6254
6373
6456
6579
6660
6777

[1,2,3,4,5,6,7,8,9,10,23,11,20,13,22,15,26,17,24,
 19,25,14,27,16,29,18,35,12,37,21,34,55,28,31,40,
 33,41,30,47,32,45,38,49,36,59,42,53,44,39,46,51,
 43,50,61,48,65,71,52,63,58,67,54,73,56,79,60,77]