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%I A192995 #7 Dec 18 2015 18:17:41
%S A192995 0,1,1,5,24,184,2052,34481,852317,31436448,1719054683,139749375352,
%T A192995 16887682211105,3032513808121101,809442991768500676,
%U A192995 321179427812462958357,189437827654558885755438
%N A192995 Number of n X n symmetric 0..1 arrays with each element equal to at least two horizontal or vertical neighbors and with new values 0..1 introduced in lower triangular row major order
%H A192995 R. H. Hardin, <a href="/A192995/b192995.txt">Table of n, a(n) for n = 1..19</a>
%e A192995 Some solutions for 8X8 containing a 1
%e A192995 ..0..0..0..0..0..0..0..0....0..0..0..0..1..1..0..0....0..0..0..0..0..0..0..0
%e A192995 ..0..0..1..1..0..0..0..0....0..1..1..0..1..1..0..0....0..1..1..1..1..1..0..0
%e A192995 ..0..1..1..1..0..0..1..1....0..1..1..0..1..1..1..0....0..1..1..1..1..1..0..0
%e A192995 ..0..1..1..1..1..0..1..1....0..0..0..0..0..1..1..0....0..1..1..1..0..0..0..0
%e A192995 ..0..0..0..1..1..0..1..1....1..1..1..0..0..1..1..0....0..1..1..0..0..1..1..0
%e A192995 ..0..0..0..0..0..0..0..1....1..1..1..1..1..1..0..0....0..1..1..0..1..1..1..0
%e A192995 ..0..0..1..1..1..0..0..1....0..0..1..1..1..0..0..0....0..0..0..0..1..1..1..0
%e A192995 ..0..0..1..1..1..1..1..1....0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
%K A192995 nonn
%O A192995 1,4
%A A192995 _R. H. Hardin_ Jul 14 2011

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