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A154438 as a simple table

na(n)
00
11
23
32
47
54
65
76
815
912
109
1110
1211
138
1413
1514
1631
1728
1825
1926
2019
2116
2221
2322
2423
2520
2617
2718
2827
2924
3029
3130
3263
3360
3457
3558
3651
3748
3853
3954
4039
4136
4233
4334
4443
4540
4645
4746
4847
4944
5041
5142
5235
5332
5437
5538
5655
5752
5849
5950
6059
6156
6261
6362
64127
65124
66121
67122
68115
69112

[0,1,3,2,7,4,5,6,15,12,9,10,11,8,13,14,31,28,25,
 26,19,16,21,22,23,20,17,18,27,24,29,30,63,60,57,
 58,51,48,53,54,39,36,33,34,43,40,45,46,47,44,41,
 42,35,32,37,38,55,52,49,50,59,56,61,62,127,124,
 121,122,115,112]