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A228722 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
1110
1212
1312
1414
1514
1616
1716
1818
1918
2018
2121
2221
2323
2423
2525
2625
2727
2827
2929
3030
3130
3232
3332
3434
3534
3636
3736
3838
3938
4038
4141
4241
4343
4443
4545
4645
4747
4847
4949
5050
5150
5252
5352
5454
5554
5656
5756
5858
5958
6058
6161
6261
6363
6463
6565
6665

[0,1,2,3,4,5,6,7,8,9,10,10,12,12,14,14,16,16,18,
 18,18,21,21,23,23,25,25,27,27,29,30,30,32,32,34,
 34,36,36,38,38,38,41,41,43,43,45,45,47,47,49,50,
 50,52,52,54,54,56,56,58,58,58,61,61,63,63,65,65]