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A101290 as a simple table

na(n)
00
11
21
33
43
53
65
75
85
97
107
117
127
137
147
159
169
179
1811
1911
2011
2111
2211
2311
2412
2512
2612
2714
2814
2914
3014
3114
3214
3315
3415
3515
3616
3716
3816
3916
4016
4116
4216
4316
4416
4518
4618
4718
4819
4919
5019
5119
5219
5319
5420
5520
5620
5720
5820
5920
6022
6122
6222
6323
6423
6523
6623
6723
6823
6925
7025
7125
7225
7325
7425

[0,1,1,3,3,3,5,5,5,7,7,7,7,7,7,9,9,9,11,11,11,11,
 11,11,12,12,12,14,14,14,14,14,14,15,15,15,16,16,
 16,16,16,16,16,16,16,18,18,18,19,19,19,19,19,19,
 20,20,20,20,20,20,22,22,22,23,23,23,23,23,23,25,
 25,25,25,25,25]