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A081874 as a simple table

na(n)
13
25
37
49
511
613
715
817
919
1021
1123
1225
1327
1429
1531
1633
1733
1835
1937
2039
2139
2241
2343
2445
2547
2649
2751
2851
2953
3055
3157
3257
3359
3461
3563
3665
3765
3867
3969
4069
4171
4273
4375
4475
4577
4679
4781
4883
4985
5085
5187
5287
5389
5491
5593
5693
5795
5895
5997
6099
61101
62103
63105
64105
65105
66107
67109
68111

[3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,33,
 35,37,39,39,41,43,45,47,49,51,51,53,55,57,57,59,
 61,63,65,65,67,69,69,71,73,75,75,77,79,81,83,85,
 85,87,87,89,91,93,93,95,95,97,99,101,103,105,105,
 105,107,109,111]