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%I #19 Apr 26 2023 06:12:22
%S 36,196,484,900,1444,2116,2916,3844,4900,6084,7396,8836,10404,12100,
%T 13924,15876,17956,20164,22500,24964,27556,30276,33124,36100,39204,
%U 42436,45796,49284,52900,56644,60516,64516,68644,72900,77284,81796,86436,91204,96100,101124
%N a(n) = (8*n+6)^2.
%H Vincenzo Librandi, <a href="/A017138/b017138.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 G.f.: ( -36-88*x-4*x^2 ) / (x-1)^3. - _R. J. Mathar_, Aug 26 2015
%F From _Amiram Eldar_, Apr 26 2023: (Start)
%F a(n) = A017137(n)^2.
%F a(n) = 2^2*A016838(n).
%F Sum_{n>=0} 1/a(n) = Pi^2/64 - G/8, where G is Catalan's constant (A006752). (End)
%t Table[(8*n + 6)^2, {n, 0, 30}] (* _Amiram Eldar_, Apr 26 2023 *)
%o (Magma) [(8*n+6)^2: n in [0..35]]; // _Vincenzo Librandi_, Jul 22 2011
%o (PARI) a(n)=(8*n+6)^2 \\ _Charles R Greathouse IV_, Jun 17 2017
%Y Cf. A006752, A016838, A017137.
%K nonn,easy
%O 0,1
%A _N. J. A. Sloane_
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