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A177288 as a simple table

na(n)
11
26
390
42520
5113400
67484400
7681080400
881729648000
97580424852000
10569159625434400
1136636506215016400

[1,6,90,2520,113400,7484400,681080400,81729648000,
 7580424852000,569159625434400,36636506215016400]