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 A231888 #12 Jun 10 2017 11:24:18 %S A231888 0,7,26,57,190,646,1914,5960,18824,58248,181196,565328,1759720, %T A231888 5477376,17062956,53131824,165443096,515219344,1604410136,4996129756, %U A231888 15558217340,48448930636,150871392396,469819443204,1463035474136,4555944690588,14187380873768 %N A231888 Number of maximal 3-independent sets in the 3-dimensional (3, 3, n) grid graph. %H A231888 Andrew Howroyd, <a href="/A231888/b231888.txt">Table of n, a(n) for n = 0..100</a> %H A231888 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 A231888 Cf. A197054, A231884, A231887, A231888, A217631, A217632. %K A231888 nonn %O A231888 0,2 %A A231888 _N. J. A. Sloane_, Nov 17 2013 %E A231888 Terms a(13) and beyond from _Andrew Howroyd_, Jun 10 2017