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A265185 as a simple table

na(n)
04
18
224
380
4272
5928
63168
710816
836928
9126080
10430464
111469696
125017856
1317132032
1458492416
15199705600
16681837568
172327939072
187948081152
1927136446464
2092649623552
21316325601280
221080003158016
233687361429504
2412589439401984
2542983034748928

[4,8,24,80,272,928,3168,10816,36928,126080,430464,
 1469696,5017856,17132032,58492416,199705600,
 681837568,2327939072,7948081152,27136446464,
 92649623552,316325601280,1080003158016,
 3687361429504,12589439401984,42983034748928]