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 A088941 #16 Jun 17 2017 03:06:05
%S A088941 0,12,54,154,349,685,1217,2009,3134,4674,6720,9372,12739,16939,22099,
%T A088941 28355,35852,44744,55194,67374,81465,97657,116149,137149,160874,
%U A088941 187550,217412,250704,287679,328599,373735,423367,477784,537284,602174,672770
%N A088941 a(n)=12*sum(1<=i<=j<=k<=n,i*j/k).
%C A088941 Always an integer.
%H A088941 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (5,-10,10,-5,1).
%F A088941 a(n)=(n/24)*(9*n^3 + 58*n^2 + 123*n + 98).
%F A088941 G.f.: x*(x^3-4*x^2+6*x-12) / (x-1)^5. - _Colin Barker_, Jun 15 2013
%t A088941 LinearRecurrence[{5,-10,10,-5,1},{0,12,54,154,349},40] (* _Harvey P. Dale_, May 01 2014 *)
%o A088941 (PARI) a(n)=if(n<0,0,a(n)=n/24*(9*n^3 + 58*n^2 + 123*n + 98))
%Y A088941 Cf. A088942, A088943.
%Y A088941 A051798(n) - 1.
%K A088941 nonn,easy
%O A088941 0,2
%A A088941 _Benoit Cloitre_, Oct 25 2003