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A178753 as a simple table

na(n)
20
31
47
56
65
74
812
913
1014
1115
128
139
1410
1511
1621
1720
1823
1922
2017
2116
2219
2318
2429
2528
2631
2730
2825
2924
3027
3126
3238
3339
3436
3537
3634
3735
3832
3933
4046
4147
4244
4345
4442
4543
4640
4741
4854
4955
5052
5153
5250
5351
5448
5549
5662
5763
5860
5961
6058
6159
6256
6357
6471
6570
6669
6768
6867
6966
7065
7164
7279
7378

[0,1,7,6,5,4,12,13,14,15,8,9,10,11,21,20,23,22,17,
 16,19,18,29,28,31,30,25,24,27,26,38,39,36,37,34,
 35,32,33,46,47,44,45,42,43,40,41,54,55,52,53,50,
 51,48,49,62,63,60,61,58,59,56,57,71,70,69,68,67,
 66,65,64,79,78]