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A180925 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1919
2020
2121
2222
2323
2424
2525
2626
2727
2828
2929
3030
3131
3232
3333
3434
3535
3636
3737
3838
3939
4040
4141
4242
4343
4444
4545
4646
4747
4849
4950
5051
5152
5253
5354
5455
5556
5657
5758
5859
5961
6062
6163
6264
6365
6466
6567
6668
6769
6870

[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,
 20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,
 36,37,38,39,40,41,42,43,44,45,46,47,49,50,51,52,
 53,54,55,56,57,58,59,61,62,63,64,65,66,67,68,69,
 70]