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 A160483 #7 Jun 02 2025 01:41:02 %S A160483 -11,36,-85,166,-287,456,-681,970,-1331,1772,-2301,2926,-3655,4496, %T A160483 -5457,6546,-7771,9140,-10661,12342,-14191,16216,-18425,20826,-23427, %U A160483 26236,-29261,32510,-35991,39712,-43681,47906,-52395,57156 %N A160483 Second right hand column of the Beta triangle A160480. %H A160483 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (-4,-6,-4,-1). %F A160483 a(n) = (-1)^(n)*(2*n+1)^2 - a(n-1) for n = 2, 3, .. , with a(1) = -11. %F A160483 From _Chai Wah Wu_, Sep 24 2020: (Start) %F A160483 a(n) = - 4*a(n-1) - 6*a(n-2) - 4*a(n-3) - a(n-4) for n > 4. %F A160483 G.f.: x*(-2*x^3 - 7*x^2 - 8*x - 11)/(x + 1)^4. (End) %Y A160483 A160480 is the Beta triangle. %Y A160483 A160484 is the third right hand column. %K A160483 easy,sign %O A160483 1,1 %A A160483 _Johannes W. Meijer_, May 24 2009