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A072089 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1519
1616
1717
1818
1915
2020
2121
2222
2323
2424
2525
2626
2727
2828
2933
3030
3131
3232
3329
3434
3535
3636
3737
3839
3951
4056
4152
4242
4353
4444
4545
4646
4743
4848
4949
5050
5138
5260
5347
5454
5561
5640
5757
5858
5959
6041
6155
6262
6363
6464
6565
6666
6767
6868
6969
7070
7175

[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,19,16,17,18,
 15,20,21,22,23,24,25,26,27,28,33,30,31,32,29,34,
 35,36,37,39,51,56,52,42,53,44,45,46,43,48,49,50,
 38,60,47,54,61,40,57,58,59,41,55,62,63,64,65,66,
 67,68,69,70,75]