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A321993 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
3940
4041
4142
4243
4344
4446
4547
4648
4750
4851
4952
5054
5155
5256
5357
5458
5559
5660
5761
5863
5966
6067
6168
6269
6372
6473
6580
6686
6796
68102

[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,
 36,37,38,40,41,42,43,44,46,47,48,50,51,52,54,55,
 56,57,58,59,60,61,63,66,67,68,69,72,73,80,86,96,
 102]