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 A231887 #12 Jun 10 2017 11:00:11 %S A231887 0,11,46,182,1026,4836,23922,118674,584516,2889306,14266546,70455052, %T A231887 347980122,1718525298,8487343508,41916544250,207013446378, %U A231887 1022380190332,5049238367202,24936725579450,123155267567884,608228181611074,3003862808227186,14835208208589988 %N A231887 Number of maximal 2-independent sets in the 3-dimensional (3, 3, n) grid graph. %H A231887 Andrew Howroyd, <a href="/A231887/b231887.txt">Table of n, a(n) for n = 0..100</a> %H A231887 R. Euler, P. Oleksik, Z. Skupien, <a href="http://dx.doi.org/10.7151/dmgt.1707">Counting Maximal Distance-Independent Sets in Grid Graphs</a>, Discussiones Mathematicae Graph Theory. Volume 33, Issue 3, Pages 531-557, ISSN (Print) 2083-5892, July 2013; see <a href="http://www.degruyter.com/view/j/dmgt.2013.33.issue-3/dmgt.1707/dmgt.1707.xml">also</a>. %Y A231887 Cf. A197054, A231884, A231886, A231888, A217631, A217632. %K A231887 nonn %O A231887 0,2 %A A231887 _N. J. A. Sloane_, Nov 17 2013 %E A231887 Terms a(13) and beyond from _Andrew Howroyd_, Jun 10 2017