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A262261 as a simple table

na(n)
01
14
2112
324640
444844800
5695273779200
693581069585203200
7110803729631663996928000
81165466869384731418887782400000
9109720873815210197693149787062272000000
1093006053830822450607559730484293052399616000000

[1,4,112,24640,44844800,695273779200,
 93581069585203200,110803729631663996928000,
 1165466869384731418887782400000,
 109720873815210197693149787062272000000,
 93006053830822450607559730484293052399616000000]