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A173464 as a simple table

na(n)
11
25
35
417
55
617
721
849
95
1017
1121
1249
1321
1453
1581
16129
175
1817
1921
2049
2121
2253
2381
24129
2521
2653
2781
28133
2981
30165
31289
32321

[1,5,5,17,5,17,21,49,5,17,21,49,21,53,81,129,5,17,
 21,49,21,53,81,129,21,53,81,133,81,165,289,321]