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A232425 as a simple table

na(n)
14
216
364
4240
5988
63964
715844
863808
9256096
101029152
114133548
1216607836
1366714260
14268019952
151076703872
164325480208
1717376731196
1869807805884
19280439281284
201126611556192
214525945532832
2218182121542848
2373043190744972

[4,16,64,240,988,3964,15844,63808,256096,1029152,
 4133548,16607836,66714260,268019952,1076703872,
 4325480208,17376731196,69807805884,280439281284,
 1126611556192,4525945532832,18182121542848,
 73043190744972]