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A224105 as a simple table

na(n)
01
116
21296
36912
46480000
5288000
66223392000
714224896000
81440270720000
964012032000
10562320096307200
11511200087552000
12255506749760021760000
131455878916011520000
14673863955411046400
1517969705477627904000

[1,16,1296,6912,6480000,288000,6223392000,
 14224896000,1440270720000,64012032000,
 562320096307200,511200087552000,
 255506749760021760000,1455878916011520000,
 673863955411046400,17969705477627904000]