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A131782 as a simple table

na(n)
11
25
31
411
55
61
719
811
95
101
1129
1219
1311
145
151
1641
1729
1819
1911
205
211
2255
2341
2429
2519
2611
275
281
2971
3055
3141
3229
3319
3411
355
361
3789
3871
3955
4041
4129
4219
4311
445
451
46109
4789
4871
4955
5041
5129
5219
5311
545
551
56131
57109
5889
5971
6055
6141
6229
6319
6411
655
661
67155
68131
69109
7089
7171
7255
7341
7429
7519
7611
775
781

[1,5,1,11,5,1,19,11,5,1,29,19,11,5,1,41,29,19,11,
 5,1,55,41,29,19,11,5,1,71,55,41,29,19,11,5,1,89,
 71,55,41,29,19,11,5,1,109,89,71,55,41,29,19,11,5,
 1,131,109,89,71,55,41,29,19,11,5,1,155,131,109,89,
 71,55,41,29,19,11,5,1]