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 A110315 #9 May 10 2024 10:58:56 %S A110315 1,-1,-1,-2,-5,-3,-11,-4,-19,-5,-29,-6,-41,-7,-55,-8,-71,-9,-89,-10, %T A110315 -109,-11,-131,-12,-155,-13,-181,-14,-209,-15,-239,-16,-271,-17,-305, %U A110315 -18,-341,-19,-379,-20,-419,-21,-461,-22,-505,-23,-551,-24,-599,-25,-649 %N A110315 Diagonal sums of the Fibonacci related number triangle A110314. %H A110315 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (0,3,0,-3,0,1). %F A110315 G.f.: (1-x-4x^2+x^3+x^4)/((1-x)^3*(1+x)^3). %F A110315 a(n) = 3a(n-2)-3a(n-4)+a(n-6). %F A110315 a(n) = (6-n^2)(-1)^n/8-(n^2+4n-2)/8. %F A110315 a(2n) = A110331(n). - _R. J. Mathar_, Aug 22 2012 %K A110315 easy,sign %O A110315 0,4 %A A110315 _Paul Barry_, Jul 19 2005