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 A180770 #5 Jul 22 2025 08:30:07 %S A180770 34,40218,20624430,11094190209,6029284136868,3267207111743056, %T A180770 1771532822371947357,960486733026829603882,520757452730725828979262, %U A180770 282344956970612464702333909,153082103894376275149564128624 %N A180770 Half the number of nX10 binary arrays with each element equal to at least one neighbor. %C A180770 Column 10 of A180771 %H A180770 R. H. Hardin, <a href="/A180770/b180770.txt">Table of n, a(n) for n=1..46</a> %K A180770 nonn %O A180770 1,1 %A A180770 _R. H. Hardin_ Sep 20 2010