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A264993 as a simple table

na(n)
00
11
23
32
44
55
611
77
812
919
1015
116
128
1318
1414
1510
1616
1717
1813
199
2020
2121
2243
2327
2444
2575
2659
2723
2828
2971
3055
3139
3248
3367
3451
3535
3676
3783
3847
3931
4060
4179
4263
4322
4424
4570
4654
4738
4832
4966
5050
5134
5272
5382
5446
5530
5656
5778
5862
5926
6040
6174
6258
6342
6464
6565
6649
6733
6868
6981
7045
7129
7252
7377
7461
7525
7636
7773
7857
7941
8080
8169

[0,1,3,2,4,5,11,7,12,19,15,6,8,18,14,10,16,17,13,
 9,20,21,43,27,44,75,59,23,28,71,55,39,48,67,51,35,
 76,83,47,31,60,79,63,22,24,70,54,38,32,66,50,34,
 72,82,46,30,56,78,62,26,40,74,58,42,64,65,49,33,
 68,81,45,29,52,77,61,25,36,73,57,41,80,69]