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A053572 as a simple table

na(n)
01
11
21
33
416
575
6384
71805
88640
942336
10207368
11995808
125184000
1324192672
14121730700
15594350400
162921811200

[1,1,1,3,16,75,384,1805,8640,42336,207368,995808,
 5184000,24192672,121730700,594350400,2921811200]