|
%I #18 Sep 08 2022 08:44:42
%S 36,225,576,1089,1764,2601,3600,4761,6084,7569,9216,11025,12996,15129,
%T 17424,19881,22500,25281,28224,31329,34596,38025,41616,45369,49284,
%U 53361,57600,62001,66564,71289
%N a(n) = (9*n + 6)^2.
%H Vincenzo Librandi, <a href="/A017234/b017234.txt">Table of n, a(n) for n = 0..10000</a>
%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (3,-3,1).
%F From _R. J. Mathar_, Mar 21 2016: (Start)
%F G.f.: ( -36 - 117*x - 9*x^2 ) / (x-1)^3.
%F a(n) = 9*A016790(n). (End)
%o (Magma) [(9*n+6)^2: n in [0..35]]; // _Vincenzo Librandi_, Jul 25 2011
%o (PARI) a(n) = (9*n+6)^2; \\ _Altug Alkan_, Mar 21 2016
%Y Cf. A000290 (n^2), A017233 (9*n+6).
%K nonn,easy
%O 0,1
%A _N. J. A. Sloane_
|
