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A163916 as a simple table

na(n)
00
11
23
32
47
55
66
74
89
98
1010
1111
1214
1313
1412
1515
1616
1717
1818
1919
2020
2121
2223
2322
2430
2529
2631
2728
2824
2925
3027
3126
3258
3359
3457
3556
3654
3753
3855
3952
4060
4161
4263
4362
4451
4550
4649
4748
4832
4935
5034
5133
5236
5337
5439
5538
5646
5744
5847
5945
6040
6141
6243
6342
64127
65125
66126
67124
68119
69117

[0,1,3,2,7,5,6,4,9,8,10,11,14,13,12,15,16,17,18,
 19,20,21,23,22,30,29,31,28,24,25,27,26,58,59,57,
 56,54,53,55,52,60,61,63,62,51,50,49,48,32,35,34,
 33,36,37,39,38,46,44,47,45,40,41,43,42,127,125,
 126,124,119,117]