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A361645 as a simple table

na(n)
00
11
22
32
44
55
65
74
88
99
1010
1110
1210
1310
149
158
1616
1717
1818
1918
2020
2121
2221
2320
2420
2521
2621
2720
2818
2918
3017
3116
3232
3333
3434
3534
3636
3737
3837
3936
4040
4141
4242
4342
4442
4542
4641
4740
4840
4941
5042
5142
5242
5342
5441
5540
5636
5737
5837
5936
6034
6134
6233
6332
6464
6565
6666
6766

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