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A296784 as a simple table

na(n)
3288
41744
57200
621744
756448
8126016
9259200
10487600
11871200
121467216
132384928
143716944
155644800
168306944
1711985408
1816875216
1923392800
2031800400
2142688800
2256397616
2373738368
2495137344
25121680000
26153887344
27193179168
28240177616
29296704800
30363488400

[288,1744,7200,21744,56448,126016,259200,487600,
 871200,1467216,2384928,3716944,5644800,8306944,
 11985408,16875216,23392800,31800400,42688800,
 56397616,73738368,95137344,121680000,153887344,
 193179168,240177616,296704800,363488400]