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A265531 as a simple table

na(n)
00
11
22
33
43
55
65
75
85
95
1010
1110
1210
1310
1410
1515
1615
1717
1817
1917
2017
2121
2221
2321
2421
2525
2625
2725
2825
2929
3029
3129
3229
3329
3434
3534
3634
3734
3838
3938
4038
4138
4242
4342
4442
4542
4646
4746
4846
4946
5046
5151
5251
5351
5451
5555
5655
5755
5855
5959
6059
6159
6259
6363
6463
6565
6665
6765
6865
6965
7065
7165
7265
7365
7465
7565
7665
7765
7865
7965
8065
8165

[0,1,2,3,3,5,5,5,5,5,10,10,10,10,10,15,15,17,17,
 17,17,21,21,21,21,25,25,25,25,29,29,29,29,29,34,
 34,34,34,38,38,38,38,42,42,42,42,46,46,46,46,46,
 51,51,51,51,55,55,55,55,59,59,59,59,63,63,65,65,
 65,65,65,65,65,65,65,65,65,65,65,65,65,65,65]