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 A187397 #35 Dec 16 2016 03:05:29
%S A187397 0,0,0,0,10,16,22,36,54,66,92,122,156,196,240,288,366,426,490,590,698,
%T A187397 780,904,1036,1176,1326,1484,1650,1874,2060,2254,2512,2782,3006,3300,
%U A187397 3606,3924,4256,4600,4956,5398,5782,6178,6666,7170,7608,8144
%N A187397 Expansion of -2*x^4 *(3*x^13 +2*x^12 +x^11 -6*x^10 -10*x^9 -6*x^8 +x^7 +7*x^6 +5*x^5 -x^4 -8*x^3 -11*x^2 -8*x -5) / ((x -1)^4 *(x +1)^2 *(x^2 +1)^2 *(x^2 +x +1)^2).
%C A187397 In contrast, the number of distinct lines passing through 4 or more points in an n X n grid is given by 0, 0, 0, 10, 16, 22, 44, 74, 92, 154, 232, 326, 436, 562, 704, 998, 1268,.. = A018808(n) -A018809(n) -A018810(n) = A225606(n) -A018810(n). - _David W. Wilson_, Aug 05 2013
%H A187397 Vincenzo Librandi, <a href="/A187397/b187397.txt">Table of n, a(n) for n = 0..1000</a>
%H A187397 <a href="/index/Rec#order_14">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 2, 2, 0, -1, -4, -1, 0, 2, 2, 0, 0, -1).
%t A187397 CoefficientList[ Series[ 2x^4 (5 + 8x + 11x^2 + 8x^3 + x^4 - 5x^5 - 7x^6 - x^7 + 6x^8 + 10x^9 + 6x^10 - x^11 - 2x^12 - 3x^13)/((-1 + x)^4 (1 + x)^2 (1 + x^2)^2 (1 + x + x^2)^2), {x, 0, 43}], x] (* or *) LinearRecurrence[{0, 0, 2, 2, 0, -1, -4, -1, 0, 2, 2, 0, 0, -1}, {10, 16, 22, 36, 54, 66, 92, 122, 156, 196, 240, 288, 366, 426}, 40] (* _Robert G. Wilson v_, Feb 17 2014 *)
%Y A187397 Cf. A178465, A187062.
%K A187397 nonn,easy
%O A187397 0,5
%A A187397 _Sean A. Irvine_, Mar 23 2011
%E A187397 Definition replaced with Colin Barker's g.f. by _R. J. Mathar_, Aug 06 2013
%E A187397 Offset changed from 1 to 0 and a(0)=0 added by _Vincenzo Librandi_, Feb 19 2014