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A045754 as a simple table

na(n)
01
11
28
3120
42640
576560
62756160
7118514880
85925744000
9337767408000
1021617114112000
111534815101952000
12119715577952256000
1310175824125941760000
14936175819586641920000
1592681406139077550080000
169824229050742220308480000
171110137882733870894858240000

[1,1,8,120,2640,76560,2756160,118514880,
 5925744000,337767408000,21617114112000,
 1534815101952000,119715577952256000,
 10175824125941760000,936175819586641920000,
 92681406139077550080000,9824229050742220308480000,
 1110137882733870894858240000]