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A153141 as a simple table

na(n)
00
11
23
32
47
56
64
75
815
914
1012
1113
128
139
1410
1511
1631
1730
1828
1929
2024
2125
2226
2327
2416
2517
2618
2719
2820
2921
3022
3123
3263
3362
3460
3561
3656
3757
3858
3959
4048
4149
4250
4351
4452
4553
4654
4755
4832
4933
5034
5135
5236
5337
5438
5539
5640
5741
5842
5943
6044
6145
6246
6347
64127
65126
66124
67125
68120
69121

[0,1,3,2,7,6,4,5,15,14,12,13,8,9,10,11,31,30,28,
 29,24,25,26,27,16,17,18,19,20,21,22,23,63,62,60,
 61,56,57,58,59,48,49,50,51,52,53,54,55,32,33,34,
 35,36,37,38,39,40,41,42,43,44,45,46,47,127,126,
 124,125,120,121]