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A255407 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1923
2020
2121
2222
2325
2424
2519
2626
2727
2828
2929
3030
3137
3232
3333
3434
3535
3636
3741
3838
3939
4040
4143
4242
4347
4444
4545
4646
4753
4848
4931
5050
5151
5252
5361
5454
5549
5656
5757
5858
5967
6060
6171
6262
6363
6464
6565
6666
6777
6868
6969
7070
7183
7272
7389
7474
7575
7676
7759
7878
7991
8080
8181

[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,23,
 20,21,22,25,24,19,26,27,28,29,30,37,32,33,34,35,
 36,41,38,39,40,43,42,47,44,45,46,53,48,31,50,51,
 52,61,54,49,56,57,58,67,60,71,62,63,64,65,66,77,
 68,69,70,83,72,89,74,75,76,59,78,91,80,81]