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A081996 as a simple table

na(n)
11
22
35
49
517
629
741
849
979
10103
11121
12167
13169
14251
15307
16353
17361
18461
19529
20601
21673
22761
23859
24953
251051
261147
271279
281399

[1,2,5,9,17,29,41,49,79,103,121,167,169,251,307,
 353,361,461,529,601,673,761,859,953,1051,1147,
 1279,1399]