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A275304 as a simple table

na(n)
11
21
31
411
51
633
75
883
99
10217
1113
1299
1317
14233
1521
161159
1717
18313
1933
2095
2121
22117
2337
24249
2525
26731
2733
284729
2921
30107
3169
32447
3341
345869
3553
36345
3753
382949
39109
403437
41217
42359
4373
44769
4557
4610181
4781
482291
4997
503217
5173
526445
53105
54493
5581
566035
57113

[1,1,1,11,1,33,5,83,9,217,13,99,17,233,21,1159,17,
 313,33,95,21,117,37,249,25,731,33,4729,21,107,69,
 447,41,5869,53,345,53,2949,109,3437,217,359,73,
 769,57,10181,81,2291,97,3217,73,6445,105,493,81,
 6035,113]