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A375469 as a simple table

na(n)
00
12
21
34
43
55
68
77
89
96
1013
1111
1214
1310
1412
1518
1616
1720
1815
1917
2019
2124
2222
2326
2421
2523
2625
2727
2832
2930
3034
3129
3231
3333
3435
3528
3641
3739
3843
3937
4040
4142
4244
4336
4438
4551
4648
4753
4846
4950
5052
5154
5245
5347
5449
5562
5658
5764
5856
5960
6063
6165
6255
6357
6459
6561

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