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A064706 as a simple table

na(n)
00
11
22
33
45
54
67
76
810
911
108
119
1215
1314
1413
1512
1620
1721
1822
1923
2017
2116
2219
2318
2430
2531
2628
2729
2827
2926
3025
3124
3240
3341
3442
3543
3645
3744
3847
3946
4034
4135
4232
4333
4439
4538
4637
4736
4860
4961
5062
5163
5257
5356
5459
5558
5654
5755
5852
5953
6051
6150
6249
6348
6480
6581
6682
6783
6885
6984
7087
7186

[0,1,2,3,5,4,7,6,10,11,8,9,15,14,13,12,20,21,22,
 23,17,16,19,18,30,31,28,29,27,26,25,24,40,41,42,
 43,45,44,47,46,34,35,32,33,39,38,37,36,60,61,62,
 63,57,56,59,58,54,55,52,53,51,50,49,48,80,81,82,
 83,85,84,87,86]