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A084659 as a simple table

na(n)
01
10
21
360
42555
5466200
662791575
714536021500
88381453705625
93284480337138000
101942832950684250625
112143745512307546647500
121743194710893176557891875
132022583790860881671548125000

[1,0,1,60,2555,466200,62791575,14536021500,
 8381453705625,3284480337138000,
 1942832950684250625,2143745512307546647500,
 1743194710893176557891875,
 2022583790860881671548125000]