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A233526 as a simple table

na(n)
11
23
31
45
53
67
75
89
91
1017
1115
1219
1311
1427
1517
1637
1731
1843
1919
2067
219
22125
2319
24231
2573
26389
27195
28583
29197
30969
31607
321331
331097
341565
35629
362501

[1,3,1,5,3,7,5,9,1,17,15,19,11,27,17,37,31,43,19,
 67,9,125,19,231,73,389,195,583,197,969,607,1331,
 1097,1565,629,2501]