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A261272 as a simple table

na(n)
13
25
321
445
511
61365
745
851
9399
103465
11345
1220475
13189
14145
157161
1658905
17105
1827417
19117
206765
21148995
22108675
23329
242436525
2565637
2626235
2721945
284959
29177
3085180095
31135135
3260775
331650411
34108675

[3,5,21,45,11,1365,45,51,399,3465,345,20475,189,
 145,7161,58905,105,27417,117,6765,148995,108675,
 329,2436525,65637,26235,21945,4959,177,85180095,
 135135,60775,1650411,108675]