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A073884 as a simple table

na(n)
12
23
35
44
56
68
79
87
910
1012
1114
1215
1316
1418
1520
1611
1721
1813
1922
2024
2125
2226
2327
2428
2530
2632
2733
2834
2935
3036
3138
3239
3340
3442
3544
3645
3746
3848
3949
4017
4150
4251
4352
4454
4555
4656
4757
4858
4960
5019
5162
5263
5364
5465
5566
5668
5769
5870
5923
6072
6174
6275
6329
6476
6577
6678
6780
6881
6982
7084
7185
7231

[2,3,5,4,6,8,9,7,10,12,14,15,16,18,20,11,21,13,22,
 24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,
 45,46,48,49,17,50,51,52,54,55,56,57,58,60,19,62,
 63,64,65,66,68,69,70,23,72,74,75,29,76,77,78,80,
 81,82,84,85,31]