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 A089276 #4 Sep 27 2012 12:45:13 %S A089276 1,1,8,1,48,180,1,160,3204,8064,1,400,24972,311328,604800,1,840, %T A089276 125468,4654656,42454080,68428800,1,1568,476728,40968960,1073980368, %U A089276 7803233280,10897286400,1,2688,1490328,254542720,15076235088,306406471680 %N A089276 Coefficient triangle of polynomials used for numerator of g.f.s for column sequences of array A078739. %C A089276 The polynomials are po(n,x) := sum(a(n,m)*x^m,m=0..n-1). Companion polynomials are pe(n,x) := sum(b(n,m)*x^m,m=0..n-1) with b(n,m) := A089275(n,m), n>=1, po(1,x) = 1 = pe(1,x). %C A089276 For the recursion relation of these polynomials and the triangles see A089275. %K A089276 nonn,easy,tabl %O A089276 1,3 %A A089276 _Wolfdieter Lang_, Nov 07 2003