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A087999 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
131
1414
1515
168
171
1818
191
2020
2121
2222
231
2424
255
262
279
2828
291
3030
311
328
3333
342
3535
3636
371
382
393
4040
411
4242
431
4444
4545
462
471
4824
497
5010
513
524
531
5418
5555
5656
573
582
591
6060
611
622
6363
648
655
6666
671
684
693
7070
711
7272
731
742
7515
764
7777
786
791
8040
819
822
831
8484
855
862
873
8888

[1,2,3,4,5,6,7,8,9,10,11,12,1,14,15,8,1,18,1,20,
 21,22,1,24,5,2,9,28,1,30,1,8,33,2,35,36,1,2,3,40,
 1,42,1,44,45,2,1,24,7,10,3,4,1,18,55,56,3,2,1,60,
 1,2,63,8,5,66,1,4,3,70,1,72,1,2,15,4,77,6,1,40,9,
 2,1,84,5,2,3,88]