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A331172 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1812
1913
2014
2115
2216
2317
2424
2525
2626
2727
2828
2929
3030
3131
3232
3333
3434
3535
3636
3737
3838
3939
4040
4141
4242
4343
4444
4545
4646
4747
4842
4943
5044
5145
5246
5347
5454
5555
5656
5757
5858
5959
6060
6161
6262
6363
6464
6565
6666
6767
6868
6969
7070
7171
7272
7373
7474
7575
7676
7777
7878
7979
8080
8181

[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,12,
 13,14,15,16,17,24,25,26,27,28,29,30,31,32,33,34,
 35,36,37,38,39,40,41,42,43,44,45,46,47,42,43,44,
 45,46,47,54,55,56,57,58,59,60,61,62,63,64,65,66,
 67,68,69,70,71,72,73,74,75,76,77,78,79,80,81]