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A157585 as a simple table

na(n)
21
33
4330
527570
62233965
7165759111
811709395180
9864416336904
1061700500723635
113932420281395045
12229474040212588578
1312613127103936869874
14664285970637825836755
1533831654295810674426165
161673010760008675643666440

[1,3,330,27570,2233965,165759111,11709395180,
 864416336904,61700500723635,3932420281395045,
 229474040212588578,12613127103936869874,
 664285970637825836755,33831654295810674426165,
 1673010760008675643666440]