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A351868 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
112
1212
1313
1414
1515
1616
1717
1818
1919
2020
2121
224
2323
2424
2525
2626
2727
2828
2929
3030
3131
3232
336
3434
3535
3636
3737
3838
3939
4040
4141
4242
4343
448
4545
4646
4747
4848
4949
5050
5151
5252
5353
5454
5510
5656
5757
5858
5959
6060
6161
6262
6363
6464
6565
6612
6767
6868

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