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A073281 as a simple table

na(n)
00
11
23
32
47
55
68
74
86
917
1018
1112
1211
1315
1420
1513
1621
179
1810
1922
2014
2116
2219
2345
2446
2548
2649
2750
2831
2932
3030
3128
3229
3340
3439
3543
3652
3754
3855
3934
4033
4141
4257
4335
4458
4523
4624
4759
4825
4926
5027
5161
5236
5362
5437
5538
5663
5742
5844
5947
6064
6151
6253
6356
6460
65129
66130
67132
68133
69134

[0,1,3,2,7,5,8,4,6,17,18,12,11,15,20,13,21,9,10,
 22,14,16,19,45,46,48,49,50,31,32,30,28,29,40,39,
 43,52,54,55,34,33,41,57,35,58,23,24,59,25,26,27,
 61,36,62,37,38,63,42,44,47,64,51,53,56,60,129,130,
 132,133,134]