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A110348 as a simple table

na(n)
11
21
38
445
5504
65040
786400
81247400
928828800
10544864320
1115850598400
12370507737600
1312996271411200
14362038989312000
1514867734494412800
16480878287553664000
1722629566473113600000
18833522365093017600000

[1,1,8,45,504,5040,86400,1247400,28828800,
 544864320,15850598400,370507737600,12996271411200,
 362038989312000,14867734494412800,
 480878287553664000,22629566473113600000,
 833522365093017600000]