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A082753 as a simple table

na(n)
10
21
35
417
549
6129
7321
8769
91793
104097
119217
1220481
1345057
1498305
15212993

[0,1,5,17,49,129,321,769,1793,4097,9217,20481,
 45057,98305,212993]