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A147195 as a simple table

na(n)
11
21
31
41
51
61
71
81
95
105
1117
1217
1345
1445
15217
16217
171805
181805
1929665
2029665
21431133
22431133
237762019
247762019
25212346129
26212346129

[1,1,1,1,1,1,1,1,5,5,17,17,45,45,217,217,1805,
 1805,29665,29665,431133,431133,7762019,7762019,
 212346129,212346129]