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A165457 as a simple table

na(n)
01
110
2280
315120
41330560
5172972800
631135104000
77410154752000
82252687044608000
9851515702861824000
10391697223316439040000
11215433472824041472000000
12139600890389978873856000000

[1,10,280,15120,1330560,172972800,31135104000,
 7410154752000,2252687044608000,851515702861824000,
 391697223316439040000,215433472824041472000000,
 139600890389978873856000000]