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A301616 as a simple table

na(n)
01
12
225
3800
448841
54867200
6719580625
7147968000000
840399053800625
914140937699532800
106174655078400355625
113290389182409605120000
122101698235513021884765625
131585118602783467315200000000
141393789829051727854522489390625

[1,2,25,800,48841,4867200,719580625,147968000000,
 40399053800625,14140937699532800,
 6174655078400355625,3290389182409605120000,
 2101698235513021884765625,
 1585118602783467315200000000,
 1393789829051727854522489390625]