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A365815 as a simple table

na(n)
319
45
531
67
743
8-1
9-1
1011
1167
1213
1379
1443
15151
1617
17103
1819
19191
2061
21127
2223
23139
2473
25151
2679
27163
2829
296091
3031
31311
3297
33199
34103
35211
3637
37223
38229
391093
4041
412707
4243
43431
44661
45271
4647
47283
481009
49491
50151
51307
5253
533499
54163
55331
56337
57571
5859
594603
6061

[19,5,31,7,43,-1,-1,11,67,13,79,43,151,17,103,19,
 191,61,127,23,139,73,151,79,163,29,6091,31,311,97,
 199,103,211,37,223,229,1093,41,2707,43,431,661,
 271,47,283,1009,491,151,307,53,3499,163,331,337,
 571,59,4603,61]