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 A059603 #7 Jul 03 2017 19:42:08
%S A059603 1,27,273,1715,8007,30381,98735,284349,742950,1791426,4037670,8591154,
%T A059603 17392258,33711510,62886162,113381398,198287439,337392405,560004575,
%U A059603 908737245,1444515345,2253115995,3453615945,5209188075,7740767580,11344196916,16411557852
%N A059603 Expansion of (1+15*x+15*x^2+x^3)/(1-x)^12.
%C A059603 a(n)= A038166(2*n).
%H A059603 T. D. Noe, <a href="/A059603/b059603.txt">Table of n, a(n) for n = 0..1000</a>
%H A059603 <a href="/index/Rec#order_12">Index entries for linear recurrences with constant coefficients</a>, signature (12, -66, 220, -495, 792, -924, 792, -495, 220, -66, 12, -1).
%F A059603 a(n)= binomial(n+8, 8)*(2*n+9)*(8*n^2+72*n+55)/(11*5*9).
%F A059603 G.f.:(1+15*x+15*x^2+x^3)/(1-x)^12.
%t A059603 CoefficientList[Series[(1+15x+15x^2+x^3)/(1-x)^12,{x,0,40}],x] (* or *) LinearRecurrence[{12,-66,220,-495,792,-924,792,-495,220,-66,12,-1},{1,27,273,1715,8007,30381,98735,284349,742950,1791426,4037670,8591154},40] (* _Harvey P. Dale_, Jul 03 2017 *)
%K A059603 nonn,easy
%O A059603 0,2
%A A059603 _Wolfdieter Lang_, Feb 02 2001