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A281575 as a simple table

na(n)
13
25
311
415
519
629
735
839
951
1059
1161
1265
1369
1471
1579
1685
1795
18101
19131
20139
21141
22145
23159
24181
25199
26205
27209
28221
29231
30271
31299
32309
33329
34349
35371
36379
37391
38409
39415
40449
41461
42471
43519
44521
45535
46545
47559
48569
49571
50581
51631
52641
53649
54661
55685
56689
57739
58745
59751
60779
61799
62815
63821
64861

[3,5,11,15,19,29,35,39,51,59,61,65,69,71,79,85,95,
 101,131,139,141,145,159,181,199,205,209,221,231,
 271,299,309,329,349,371,379,391,409,415,449,461,
 471,519,521,535,545,559,569,571,581,631,641,649,
 661,685,689,739,745,751,779,799,815,821,861]