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A077021 as a simple table

na(n)
31
43
55
61
711
89
913
1031
115
1257
1367
1447
15181
1687
17275
18449
19101
20999
21797
221201
232795
24393
255197
265983
274411
2816377
297555
3025199
3140309
3210089
3390707
3470529
35110885
36251943
3730173
38473713
39534059
40413367
411481485
42654751
432308219
443617721

[1,3,5,1,11,9,13,31,5,57,67,47,181,87,275,449,101,
 999,797,1201,2795,393,5197,5983,4411,16377,7555,
 25199,40309,10089,90707,70529,110885,251943,30173,
 473713,534059,413367,1481485,654751,2308219,
 3617721]