This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A187062 #42 Jun 13 2015 00:53:44
%S A187062 0,0,8,14,26,42,64,90,134,172,232,300,378,464,584,690,834,990,1160,
%T A187062 1342,1574,1784,2048,2328,2626,2940,3320,3670,4090,4530,4992,5474,
%U A187062 6038,6564,7176,7812,8474,9160,9944,10682,11522,12390,13288,14214
%N A187062 Expansion of 2*x^2 *(4 +7*x +5*x^2 -x^3 -4*x^4 +6*x^6 +4*x^7 -x^8 -2*x^9) / ((1+x)^2 *(1+x+x^2)^2 *(1-x)^4) .
%H A187062 Vincenzo Librandi, <a href="/A187062/b187062.txt">Table of n, a(n) for n = 1..1000</a>
%H A187062 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (0,2,2,-1,-4,-1,2,2,0,-1).
%F A187062 a(n) = 2*a(n-2) + 2*a(n-3) - a(n-4) - 4*a(n-5) - a(n-6) + 2*a(n-7) + 2*a(n-8) - a(n-10) .
%t A187062 CoefficientList[Series[ 2x^2 (4 + 7x + 5x^2 - x^3 - 4x^4 + 6x^6 + 4x^7 - x^8 - 2x^9)/((1 + x)^2 (1 + x + x^2)^2 (x - 1)^4), {x, 0, 43}], x] (* or *) LinearRecurrence[ {0, 2, 2, -1, -4, -1, 2, 2, 0, -1}, {8, 14, 26, 42, 64, 90, 134, 172, 232, 300}, 42] (* _Robert G. Wilson v_, Feb 17 2014 *)
%Y A187062 Cf. A000755, A178465, A187397, A225606.
%K A187062 nonn,easy
%O A187062 1,3
%A A187062 _Sean A. Irvine_, Mar 21 2011
%E A187062 Name replaced by L. Edson Jeffery's definition. _R. J. Mathar_, Aug 06 2013