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A180410 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
101
111
1212
1313
1414
1515
1616
1717
1818
1919
202
2112
222
2323
2424
2525
2626
2727
2828
2929
303
3113
3223
333
3434
3535
3636
3737
3838
3939
404
4114
4224
4334
444
4545
4646
4747
4848
4949
505
5115
5225
5335
5445
555
5656
5757
5858
5959
606
6116
6226
6336
6446
6556
666
6767
6868
6969
707

[1,2,3,4,5,6,7,8,9,1,1,12,13,14,15,16,17,18,19,2,
 12,2,23,24,25,26,27,28,29,3,13,23,3,34,35,36,37,
 38,39,4,14,24,34,4,45,46,47,48,49,5,15,25,35,45,5,
 56,57,58,59,6,16,26,36,46,56,6,67,68,69,7]