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A305851 as a simple table

na(n)
11
21
32
49
51331
63224179360000
7348414297354956334043085401797347258376901025074126347562215651

[1,1,2,9,1331,3224179360000,
 34841429735495633404308540179734725837690102507412\
 6347562215651]