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A280503 as a simple table

na(n)
11
22
33
42
55
62
77
82
99
1010
111
1212
131
142
1515
162
1717
182
191
202
2121
222
233
244
251
262
2727
284
293
302
3131
322
3333
346
357
3618
371
3838
395
406
411
4242
433
442
4545
466
471
4812
497
502
5151
5252
533
5418
551
5656
575
586
591
6012
611
622
6363
642
6565
662
671
682
691
702
713
722
7373
742
7515
762
773
782
797
802
811
822
839
842
8585
862
871
882
893
902
911
922
9393
942
955
964
971
982
9999
1004
1019
1022
1031
1044
10515
1062
107107
1084
1091
1102
1113
1128

[1,2,3,2,5,2,7,2,9,10,1,12,1,2,15,2,17,2,1,2,21,2,
 3,4,1,2,27,4,3,2,31,2,33,6,7,18,1,38,5,6,1,42,3,2,
 45,6,1,12,7,2,51,52,3,18,1,56,5,6,1,12,1,2,63,2,
 65,2,1,2,1,2,3,2,73,2,15,2,3,2,7,2,1,2,9,2,85,2,1,
 2,3,2,1,2,93,2,5,4,1,2,99,4,9,2,1,4,15,2,107,4,1,
 2,3,8]