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A147434 as a simple table

na(n)
11
21
31
41
51
61
71
85
917
1031
1151
12113
13291
14823
152647
168411
1731311
18121645
19537901
202460285
2112092291
2263560047
23371846157
242296989649

[1,1,1,1,1,1,1,5,17,31,51,113,291,823,2647,8411,
 31311,121645,537901,2460285,12092291,63560047,
 371846157,2296989649]