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A340447 as a simple table

na(n)
00
11
23
32
47
56
64
75
813
912
1014
1115
1210
1311
149
158
1629
1728
1830
1931
2026
2127
2225
2324
2416
2517
2619
2718
2823
2922
3020
3121
3255
3354
3452
3553
3648
3749
3851
3950
4058
4159
4257
4356
4461
4560
4662
4763
4842
4943
5041
5140
5245
5344
5446
5547
5639
5738
5836
5937
6032
6133
6235
6334
64123
65122
66120

[0,1,3,2,7,6,4,5,13,12,14,15,10,11,9,8,29,28,30,
 31,26,27,25,24,16,17,19,18,23,22,20,21,55,54,52,
 53,48,49,51,50,58,59,57,56,61,60,62,63,42,43,41,
 40,45,44,46,47,39,38,36,37,32,33,35,34,123,122,
 120]