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A147411 as a simple table

na(n)
11
21
31
41
51
61
71
85
913
1027
1143
1273
13179
14423
151083
163071
1710101
1837829
19144853
20562367
212218397
229164725
2342914033
24209532563

[1,1,1,1,1,1,1,5,13,27,43,73,179,423,1083,3071,
 10101,37829,144853,562367,2218397,9164725,
 42914033,209532563]