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A001794 as a simple table

na(n)
01
17
232
3120
4400
51232
63584
79984
826880
970400
10180224
11452608
121118208
132723840
146553600
1515597568
1636765696
1785917696
18199229440
19458752000
201049624576
212387607552
225402263552
2312163481600
2427262976000
2560850962432

[1,7,32,120,400,1232,3584,9984,26880,70400,180224,
 452608,1118208,2723840,6553600,15597568,36765696,
 85917696,199229440,458752000,1049624576,
 2387607552,5402263552,12163481600,27262976000,
 60850962432]