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A263273 as a simple table

na(n)
00
11
22
33
44
57
66
75
88
99
1010
1119
1212
1313
1422
1521
1616
1725
1818
1911
2020
2115
2214
2323
2424
2517
2626
2727
2828
2955
3030
3137
3264
3357
3446
3573
3636
3731
3858
3939
4040
4167
4266
4349
4476
4563
4634
4761
4848
4943
5070
5175
5252
5379
5454
5529
5656
5733
5838
5965
6060
6147
6274
6345
6432
6559
6642
6741
6868
6969
7050
7177
7272
7335
7462
7551
7644
7771
7878
7953
8080
8181

[0,1,2,3,4,7,6,5,8,9,10,19,12,13,22,21,16,25,18,
 11,20,15,14,23,24,17,26,27,28,55,30,37,64,57,46,
 73,36,31,58,39,40,67,66,49,76,63,34,61,48,43,70,
 75,52,79,54,29,56,33,38,65,60,47,74,45,32,59,42,
 41,68,69,50,77,72,35,62,51,44,71,78,53,80,81]