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A065913 as a simple table

na(n)
13
25
37
461
511
613
71273609
817
919
10331
1123
126431804812640900941
13547
1429
1531
16371281
17919
1837
19723901
2041
2143

[3,5,7,61,11,13,1273609,17,19,331,23,
 6431804812640900941,547,29,31,371281,919,37,
 723901,41,43]