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 A119536 #16 Sep 01 2025 23:43:58
%S A119536 0,6,30,90,204,390,666,1050,1560,2214,3030,4026,5220,6630,8274,10170,
%T A119536 12336,14790,17550,20634,24060,27846,32010,36570,41544,46950,52806,
%U A119536 59130,65940,73254,81090,89466,98400,107910,118014,128730,140076,152070
%N A119536 a(n) = 3*n^3 + 3*n.
%H A119536 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (4,-6,4,-1).
%F A119536 a(n) = 3*A034262(n) = 6*A006003(n). - _J. M. Bergot_, Apr 16 2012
%F A119536 a(0)=0, a(1)=6, a(2)=30, a(3)=90, a(n) = 4*a(n-1)-6*a(n-2)+4*a(n-3)-a(n-4). - _Harvey P. Dale_, Mar 19 2013
%p A119536 [seq (3*n^3+3*n,n=0..60)];
%t A119536 Table[3n^3+3n,{n,0,40}] (* or *) LinearRecurrence[{4,-6,4,-1},{0,6,30,90},40] (* _Harvey P. Dale_, Mar 19 2013 *)
%K A119536 easy,nonn,changed
%O A119536 0,2
%A A119536 _Zerinvary Lajos_, May 28 2006