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A081694 as a simple table

na(n)
00
11
22
34
45
56
68
79
810
911
1014
1115
1216
1317
1418
1519
1620
1722
1823
1924
2025
2126
2227
2328
2429
2532
2633
2734
2835
2936
3037
3138
3239
3340
3441
3543
3644
3746
3847
3948
4049
4150
4251
4352
4453
4554
4655
4756
4857
4958
5059
5162
5263
5364
5465
5566
5667
5768
5869
5970
6071
6172
6273
6374
6475
6576
6677
6780
6881
6982
7083

[0,1,2,4,5,6,8,9,10,11,14,15,16,17,18,19,20,22,23,
 24,25,26,27,28,29,32,33,34,35,36,37,38,39,40,41,
 43,44,46,47,48,49,50,51,52,53,54,55,56,57,58,59,
 62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,
 80,81,82,83]