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A176481 as a simple table

na(n)
01
11
21
31
43
51
61
75
85
91
101
1111
1213
1311
141
151
1625
1733
1833
1925
201
211
2259
2381
2487
2581
2659
271
281
29141
30197
31217
32217
33197
34141
351
361
37339
38477
39531
40545
41531
42477
43339
441
451
46817
471153
481289
491337
501337
511289
521153
53817
541
551
561971
572785
583119
593249
603283
613249
623119
632785
641971
651

[1,1,1,1,3,1,1,5,5,1,1,11,13,11,1,1,25,33,33,25,1,
 1,59,81,87,81,59,1,1,141,197,217,217,197,141,1,1,
 339,477,531,545,531,477,339,1,1,817,1153,1289,
 1337,1337,1289,1153,817,1,1,1971,2785,3119,3249,
 3283,3249,3119,2785,1971,1]