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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A249165 as a simple table

na(n)
11
21
34
413
572
6390
72880
821672
9201600
101935360
1121772800
12253756800
133353011200
1445924278400

[1,1,4,13,72,390,2880,21672,201600,1935360,
 21772800,253756800,3353011200,45924278400]