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A261274 as a simple table

na(n)
01
13
215
321
445
533
61365
745
8765
91995
103465
111035
1220475
13189
14435
157161
1658905
17315
18959595
194095
20142065
21148995
22108675
2314805
242436525
2565637
2678705
2721945
2824795
292655
3085180095
31135135
32546975
338252055

[1,3,15,21,45,33,1365,45,765,1995,3465,1035,20475,
 189,435,7161,58905,315,959595,4095,142065,148995,
 108675,14805,2436525,65637,78705,21945,24795,2655,
 85180095,135135,546975,8252055]