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A141444 as a simple table

na(n)
11
21
39
417
5309
61265
748927
8435807
936527739
10709448287
11129684847323
125504589599263
132200548059561679
14204460755826652731

[1,1,9,17,309,1265,48927,435807,36527739,
 709448287,129684847323,5504589599263,
 2200548059561679,204460755826652731]