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A147019 as a simple table

na(n)
11
21
31
41
513
657
7277
82427
927961
10440433
1111044775
12365499077
1316910160525
141114224590577

[1,1,1,1,13,57,277,2427,27961,440433,11044775,
 365499077,16910160525,1114224590577]