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A321524 as a simple table

na(n)
00
11
22
33
44
57
66
75
88
99
1010
1119
1212
1313
1422
1521
1614
1723
1818
1911
2020
2115
2216
2325
2424
2517
2626
2727
2828
2955
3030
3131
3258
3357
3432
3559
3636
3737
3864
3939
4040
4167
4266
4341
4468
4563
4638
4765
4842
4943
5070
5169
5244
5371
5454
5529
5656
5733
5834
5961
6060
6135
6262
6345
6446
6573
6648
6749

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