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A052700 as a simple table

na(n)
00
11
24
336
4432
56480
6116640
72449440
858786560
91587237120
1047617113600
111571364748800
1256569130956800
132206196107315200
1492660236507238400
154169710642825728000
16200146110855634944000
1710207451653637382144000

[0,1,4,36,432,6480,116640,2449440,58786560,
 1587237120,47617113600,1571364748800,
 56569130956800,2206196107315200,92660236507238400,
 4169710642825728000,200146110855634944000,
 10207451653637382144000]