login
a(n) = 12^n - n^4.
2

%I #16 Sep 08 2022 08:44:48

%S 1,11,128,1647,20480,248207,2984688,35829407,429977600,5159773791,

%T 61917354224,743008356047,8916100427520,106993205350511,

%U 1283918464510448,15407021574535743,184884258894970880

%N a(n) = 12^n - n^4.

%H Vincenzo Librandi, <a href="/A024144/b024144.txt">Table of n, a(n) for n = 0..300</a>

%H <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (17,-70,130,-125,61,-12).

%o (Magma) [12^n-n^4: n in [0..20]]; // _Vincenzo Librandi_, Jul 01 2011

%o (PARI) a(n)= 12^n-n^4 \\ _Charles R Greathouse IV_, Jul 01 2011

%K nonn,easy

%O 0,2

%A _N. J. A. Sloane_