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A025249 as a simple table

na(n)
11
21
33
47
513
629
771
8163
9377
10913
112219
125375
1313189
1432677
1581167
16202523
17508273
181280537
193236275
208207543
2120880893
2253263405
23136205527
24349137811
25896881641
262308523809
275953138875
2815378562415
2939791453685
30103115768885
31267597960095

[1,1,3,7,13,29,71,163,377,913,2219,5375,13189,
 32677,81167,202523,508273,1280537,3236275,8207543,
 20880893,53263405,136205527,349137811,896881641,
 2308523809,5953138875,15378562415,39791453685,
 103115768885,267597960095]