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A254939 as a simple table

na(n)
11
24
336
4120
52520
6277200
75045040
8183783600
94655851200
1080313433200
1132607253879200
122743667504978400
1358772246027695200
145038384364010597600
1556517528952814529600
1634089489546705963770400
177391221142626702144764000

[1,4,36,120,2520,277200,5045040,183783600,
 4655851200,80313433200,32607253879200,
 2743667504978400,58772246027695200,
 5038384364010597600,56517528952814529600,
 34089489546705963770400,7391221142626702144764000]