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A129787 as a simple table

na(n)
13
25
39
421
549
6122
7313
8821
92187
105905
1116105
1244287
13122641
14341641
15956594
162690421
177596481
1821523361
1961171657
20174339221
21498112058
221426411801
234093181689
2411767897354
2533891544378
2697764070321
27282429536481

[3,5,9,21,49,122,313,821,2187,5905,16105,44287,
 122641,341641,956594,2690421,7596481,21523361,
 61171657,174339221,498112058,1426411801,
 4093181689,11767897354,33891544378,97764070321,
 282429536481]