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A060859 as a simple table

na(n)
18
2288
3675
49800
5235224
6332928
71825200
811309768
9384199200
10592192224
114931691075
1213051463048
13221322261600
14443365544448
15865363202000
168192480787000
1713325427460800
1815061377048200
19511643454094368

[8,288,675,9800,235224,332928,1825200,11309768,
 384199200,592192224,4931691075,13051463048,
 221322261600,443365544448,865363202000,
 8192480787000,13325427460800,15061377048200,
 511643454094368]