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A248038 as a simple table

na(n)
133
266
399
41212
51515
61818
72121
82424
92727
103030
113333
123636
133939
144242
154545
164848
175151
185454
195757
206060
216363
226666
236969
247272
257575
267878
278181
288484
298787
309090
319393
329696
339999
34102102
35105105
36108108
37111111
38114114
39117117
40120120
41123123

[33,66,99,1212,1515,1818,2121,2424,2727,3030,3333,
 3636,3939,4242,4545,4848,5151,5454,5757,6060,6363,
 6666,6969,7272,7575,7878,8181,8484,8787,9090,9393,
 9696,9999,102102,105105,108108,111111,114114,
 117117,120120,123123]