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 A101861 #9 Jun 17 2017 03:06:05 %S A101861 24,84,194,369,625,979,1449,2054,2814,3750,4884,6239,7839,9709,11875, %T A101861 14364,17204,20424,24054,28125,32669,37719,43309,49474,56250,63674, %U A101861 71784,80619,90219,100625,111879,124024,137104,151164,166250,182409 %N A101861 n*(n+5)*(50+45*n+n^2)/24. %C A101861 Essentially the partial sums of A101860. %C A101861 5th partial summation within series as series accumulate n times from an initial sequence of Euler Triangle's row 4: 1,11,11,1: 5th row of the array in the examples of A101860. %H A101861 C. Rossiter, <a href="http://noticingnumbers.net/300SeriesCube.htm">Depictions, Explorations and Formulas of the Euler/Pascal Cube</a>. %H A101861 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (5,-10,10,-5,1). %F A101861 G.f. x*(x-2)*(x^2-12*x+12) / (x-1)^5 . - R. J. Mathar, Dec 06 2011 %K A101861 easy,nonn %O A101861 1,1 %A A101861 Cecilia Rossiter (cecilia(AT)noticingnumbers.net), Dec 18 2004