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 A056575 #5 Mar 30 2012 16:48:51 %S A056575 1,4,9,24,47,108,201,424,762,1538,2675,5258,8915,17233,28518,54636, %T A056575 88459,169004,266670,512651,786932,1530464,2270857,4516598,6439085, %U A056575 13207919,17852082,38438680,48640815,111440275,128688532,324010503,331752781,944134956,810982473,2781591612,1866117373,8270004945,3647454015,25083883563,5007776568,77130163183,-6211741855 %N A056575 Series for first parallel moment of square lattice bond percolation near a wall. %H A056575 I. Jensen, <a href="/A056575/b056575.txt">Table of n, a(n) for n = 0..174</a> (from link below) %H A056575 I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/dirperc/series/sqbt1w.ser">More terms</a> %K A056575 sign %O A056575 0,2 %A A056575 _N. J. A. Sloane_, Aug 27 2000