login

A208916 as a simple table

na(n)
11
21
33
41
53
67
71
83
911
1019
111
123
1315
1435
1547
161
173
1819
1951
20107
21123
221
233
2423
2567
26183
27323
28311
291
303
3127
3283
33275
34603
35939
36803
371
383
3931
4099
41383
42963
431951
442723
452047
461
473
4835
49115
50507
511403
523411
536147
547723
555259
561
573
5839
59131
60647
611923
625383

[1,1,3,1,3,7,1,3,11,19,1,3,15,35,47,1,3,19,51,107,
 123,1,3,23,67,183,323,311,1,3,27,83,275,603,939,
 803,1,3,31,99,383,963,1951,2723,2047,1,3,35,115,
 507,1403,3411,6147,7723,5259,1,3,39,131,647,1923,
 5383]