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A374356 as a simple table

na(n)
00
11
22
32
44
55
64
75
88
99
1010
1110
128
139
1410
1510
1616
1717
1818
1918
2020
2121
2220
2321
2416
2517
2618
2718
2820
2921
3020
3121
3232
3333
3434
3534
3636
3737
3836
3937
4040
4141
4242
4342
4440
4541
4642
4742
4832
4933
5034
5134
5236
5337
5436
5537
5640
5741
5842
5942
6040
6141
6242
6342
6464
6565
6666
6766

[0,1,2,2,4,5,4,5,8,9,10,10,8,9,10,10,16,17,18,18,
 20,21,20,21,16,17,18,18,20,21,20,21,32,33,34,34,
 36,37,36,37,40,41,42,42,40,41,42,42,32,33,34,34,
 36,37,36,37,40,41,42,42,40,41,42,42,64,65,66,66]