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A302840 as a simple table

na(n)
11
22
33
44
55
610
76
88
97
109
1111
1212
1313
1414
1515
1616
1717
1818
1919
2020
2122
2221
2323
2426
2524
2625
2729
2838
2927
3028
3137
3241
3331
3445
3532
3635
3736
3840
3930
4044
4139
4246
4334
4442
4533
4647
4743
4848
4949
5050
5151
5252
5353
5474
5555
5665
5782
5873
5977
6083
6186
6290
6356
6459
6563
6664
6781

[1,2,3,4,5,10,6,8,7,9,11,12,13,14,15,16,17,18,19,
 20,22,21,23,26,24,25,29,38,27,28,37,41,31,45,32,
 35,36,40,30,44,39,46,34,42,33,47,43,48,49,50,51,
 52,53,74,55,65,82,73,77,83,86,90,56,59,63,64,81]