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A374497 as a simple table

na(n)
01
16
236
3200
41080
55712
629792
7153792
8787680
94009280
1020304768
11102405888
12514678528
132579028480
1412890311680
1564283809792
16319954540032
171589720712192
187886437652480
1939069462835200
20193307835764736
21955361266917376
224716674314223616
2323264437702656000

[1,6,36,200,1080,5712,29792,153792,787680,4009280,
 20304768,102405888,514678528,2579028480,
 12890311680,64283809792,319954540032,
 1589720712192,7886437652480,39069462835200,
 193307835764736,955361266917376,4716674314223616,
 23264437702656000]