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A290700 as a simple table

na(n)
11
25
325
449
5141
6389
71009
82761
97441
1019925
1153769
12144721
13389325
141048325
152821665
167594761
1720444065
1855029413
19148124153
20398713969
211073231821
222888859781
237776063377
2420931130057
2556341150641
26151655712629
27408217654249
281098815597201

[1,5,25,49,141,389,1009,2761,7441,19925,53769,
 144721,389325,1048325,2821665,7594761,20444065,
 55029413,148124153,398713969,1073231821,
 2888859781,7776063377,20931130057,56341150641,
 151655712629,408217654249,1098815597201]