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A280488 as a simple table

na(n)
11
21
33
44
55
62
77
88
93
1010
1111
1212
1313
1414
155
1616
1717
186
1919
204
217
2222
2323
2424
2525
2626
2727
2828
2929
302
3131
3232
3311
3434
3535
3636
3737
3838
3913
4040
4141
4214
4343
4444
459
4646
4747
4848
4949
5010
5117
5252
5353
5418
5555
568
5719
5858
5959
6012
6161
6262
6363
6464
6565
6622
6767
6868
6923
7014
7171
7272
7373
7474
755
7676
7777
7826
7979
8080
8181
8282
8383
8412
8585
8686
8729
8888
8989
9030
9191
9292
9331

[1,1,3,4,5,2,7,8,3,10,11,12,13,14,5,16,17,6,19,4,
 7,22,23,24,25,26,27,28,29,2,31,32,11,34,35,36,37,
 38,13,40,41,14,43,44,9,46,47,48,49,10,17,52,53,18,
 55,8,19,58,59,12,61,62,63,64,65,22,67,68,23,14,71,
 72,73,74,5,76,77,26,79,80,81,82,83,12,85,86,29,88,
 89,30,91,92,31]