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A156724 as a simple table

na(n)
11
21
31
43
53
63
73
85
95
105
117
127
139
149
159
169
1711
1811
1913
2013
2113
2215
2315
2417
2517
2617
2717
2819
2919
3019
3121
3221
3321
3421
3523
3623
3725
3825
3927
4027
4127
4227
4327
4429
4529
4631
4731
4831
4931
5031
5133
5233
5335
5435
5537
5637
5737
5837
5939
6039
6139
6241
6341
6441
6543
6643
6743
6843
6945
7045
7145
7247
7347
7449
7549

[1,1,1,3,3,3,3,5,5,5,7,7,9,9,9,9,11,11,13,13,13,
 15,15,17,17,17,17,19,19,19,21,21,21,21,23,23,25,
 25,27,27,27,27,27,29,29,31,31,31,31,31,33,33,35,
 35,37,37,37,37,39,39,39,41,41,41,43,43,43,43,45,
 45,45,47,47,49,49]