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A363897 as a simple table

na(n)
11
22
33
44
55
67
77
88
99
1010
1112
1214
1313
1414
1515
1617
1717
1821
1919
2020
2122
2224
2323
2428
2525
2627
2727
2828
2929
3035
3132
3234
3336
3434
3535
3643
3737
3838
3939
4040
4142
4251
4343
4448
4545
4647
4747
4859
4949
5050
5152
5254
5353
5463
5560
5657
5757
5858
5959
6070
6162
6264
6366
6468
6565
6684
6767
6868
6969
7070
7172
7286
7373
7474
7575
7677
7784
7894

[1,2,3,4,5,7,7,8,9,10,12,14,13,14,15,17,17,21,19,
 20,22,24,23,28,25,27,27,28,29,35,32,34,36,34,35,
 43,37,38,39,40,42,51,43,48,45,47,47,59,49,50,52,
 54,53,63,60,57,57,58,59,70,62,64,66,68,65,84,67,
 68,69,70,72,86,73,74,75,77,84,94]