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A046152 as a simple table

na(n)
12
23
37
49
521
613
743
833
955
1041
11111
1249
13157
1485
15121
16129
17273
18109
19343
20161
21253
22221
23507
24193
25501
26313
27487
28337
29813
30241
31931
32513
33661
34545
35841
36433
371333
38685
39937
40641
411641
42505
431807
44881
451081
461013
472163
48769
492059
501001

[2,3,7,9,21,13,43,33,55,41,111,49,157,85,121,129,
 273,109,343,161,253,221,507,193,501,313,487,337,
 813,241,931,513,661,545,841,433,1333,685,937,641,
 1641,505,1807,881,1081,1013,2163,769,2059,1001]