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A077719 as a simple table

na(n)
15
231
3131
4151
5631
6751
73251
83881
916381
1019381
1119501
1219531
1378781
1478901
1581281
1681401
1781901
1882031
1993901
2094531
2197001
2297501
2397651
24390751
25390781
26393901
27394501
28406381
29468781
30469501
31471901
32472631
33484531
34485131
35487651
361953151
371953901

[5,31,131,151,631,751,3251,3881,16381,19381,19501,
 19531,78781,78901,81281,81401,81901,82031,93901,
 94531,97001,97501,97651,390751,390781,393901,
 394501,406381,468781,469501,471901,472631,484531,
 485131,487651,1953151,1953901]