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A128755 as a simple table

na(n)
17
28
32
41
515
63
714
85
94
1023
116
129
1312
1455
1510
1611
1720
1813
1921
2029
2116
2219
2318
2430
2522
2638
2724
2843
2926
3017
3128
3227
3337
3425
3539
3631
3732
3854
3934
4061
4140
4233
4342
4441
4558
4635
4736
4845
4948
5047
5146
5257
5344
5478
5550
5651
5764
5876
5956
6074
6152
6249
6360
6463
6577
6653
6762
6859
6983
7067
7166
7265

[7,8,2,1,15,3,14,5,4,23,6,9,12,55,10,11,20,13,21,
 29,16,19,18,30,22,38,24,43,26,17,28,27,37,25,39,
 31,32,54,34,61,40,33,42,41,58,35,36,45,48,47,46,
 57,44,78,50,51,64,76,56,74,52,49,60,63,77,53,62,
 59,83,67,66,65]