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A269146 as a simple table

na(n)
14
280
3768
46224
546464
6330192
72270592
815251152
9100647168
10655139152
114217820672
1226911075152
13170416738944
141072338720464
156710943646848
1641800542176720
17259288295447040
181602497927690832
199871915467776256

[4,80,768,6224,46464,330192,2270592,15251152,
 100647168,655139152,4217820672,26911075152,
 170416738944,1072338720464,6710943646848,
 41800542176720,259288295447040,1602497927690832,
 9871915467776256]