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A177289 as a simple table

na(n)
11
26
390
42520
5113400
67484400
7681080400
881729648000
912504636144000
101522786801536000
11152883132197796000

[1,6,90,2520,113400,7484400,681080400,81729648000,
 12504636144000,1522786801536000,
 152883132197796000]