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A003955 as a simple table

na(n)
04
154
21800
3110250
410716300
51512784350
6292183491600
773958946311250
823749039426612500
99430743556307823750
104537044990907363935000
112600104866872495148416250
121750070583471871734510937500
131366930130733208386919792968750
141226227455943070136959515612500000

[4,54,1800,110250,10716300,1512784350,
 292183491600,73958946311250,23749039426612500,
 9430743556307823750,4537044990907363935000,
 2600104866872495148416250,
 1750070583471871734510937500,
 1366930130733208386919792968750,
 1226227455943070136959515612500000]