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A257894 as a simple table

na(n)
11
21
31
41
53
61
71
811
97
101
111
1225
1385
1415
151
161
17137
18415
19575
2031
211
221
2349
2412019
255845
263661
2763
281
291
30363
3113489
32874853
3376111
3422631
35127
361
371
38761
39726301
40336581
4158067611
42952525
43137845
44255
451
461
477129
483144919
49129973303
5068165041

[1,1,1,1,3,1,1,11,7,1,1,25,85,15,1,1,137,415,575,
 31,1,1,49,12019,5845,3661,63,1,1,363,13489,874853,
 76111,22631,127,1,1,761,726301,336581,58067611,
 952525,137845,255,1,1,7129,3144919,129973303,
 68165041]