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A253247 as a simple table

na(n)
11
22
33
44
55
61
77
88
99
105
1111
124
1313
147
155
1616
1717
189
1919
2010
2121
2211
2323
248
2525
2613
2727
287
2929
305
3131
3232
3333
3417
3535
3636
3737
3819
3939
4040
4141
427
4343
4411
4545
4623
4747
4816
4949
5025
5151
5226
5353
5427
5555
5614
5757
5829
5959
6010
6161
6231
6363
6464
6565
6611
6767
6817
6969
7035
7171
7272

[1,2,3,4,5,1,7,8,9,5,11,4,13,7,5,16,17,9,19,10,21,
 11,23,8,25,13,27,7,29,5,31,32,33,17,35,36,37,19,
 39,40,41,7,43,11,45,23,47,16,49,25,51,26,53,27,55,
 14,57,29,59,10,61,31,63,64,65,11,67,17,69,35,71,
 72]