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A305421 as a simple table

na(n)
11
23
37
45
521
69
711
815
949
1063
1113
1227
1319
1429
15107
1617
17273
1883
1925
2065
2169
2223
23121
2445
2531
2653
27151
2839
2935
30189
3137
3251
33251
34819
35173
36245
3741
3843
39233
40195
4147
42207
4393
4457
45997
46139
4755
48119
49127
5033
511911
5295
5379
54441
5559
56105
57367
58101
5961
60455
6167
62111
63475
6485
651281
66269
6773
681365
6981
70503
71457
72287
7387
74123
751549
76125
77179
78315

[1,3,7,5,21,9,11,15,49,63,13,27,19,29,107,17,273,
 83,25,65,69,23,121,45,31,53,151,39,35,189,37,51,
 251,819,173,245,41,43,233,195,47,207,93,57,997,
 139,55,119,127,33,1911,95,79,441,59,105,367,101,
 61,455,67,111,475,85,1281,269,73,1365,81,503,457,
 287,87,123,1549,125,179,315]