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A071770 as a simple table

na(n)
00
11
22
34
45
53
68
76
87
912
1013
1114
1216
1317
1415
1511
169
1710
1824
1925
2026
2119
2220
2318
2423
2521
2622
2736
2837
2938
3040
3141
3239
3344
3442
3543
3648
3749
3850
3952
4053
4151
4247
4345
4446
4533
4634
4735
4828
4929
5027
5132
5230
5331
5472
5573
5674
5776
5877
5975
6080
6178
6279
6357
6458
6559
6661
6762
6860
6956
7054
7155
7269
7370

[0,1,2,4,5,3,8,6,7,12,13,14,16,17,15,11,9,10,24,
 25,26,19,20,18,23,21,22,36,37,38,40,41,39,44,42,
 43,48,49,50,52,53,51,47,45,46,33,34,35,28,29,27,
 32,30,31,72,73,74,76,77,75,80,78,79,57,58,59,61,
 62,60,56,54,55,69,70]