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A068589 as a simple table

na(n)
11
24
336
4144
53600
61200
758800
8235200
96350400
106350400
11768398400
12768398400
13129859329600
14129859329600
15129859329600
16519437318400
17150117385017600
1850039128339200
1918064125330451200
2018064125330451200
2154192375991353600

[1,4,36,144,3600,1200,58800,235200,6350400,
 6350400,768398400,768398400,129859329600,
 129859329600,129859329600,519437318400,
 150117385017600,50039128339200,18064125330451200,
 18064125330451200,54192375991353600]