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A202977 Number of nX6 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.

%I A202977 #7 Jul 22 2025 16:55:03
%S A202977 1,31,866,17740,379788,8071997,170937904,3635245483,77355342983,
%T A202977 1645059084851,34980781489450,743874666203318,15818866015610506,
%U A202977 336395670890580933,7153607521601342149,152124673570902721461
%N A202977 Number of nX6 0..1 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors.
%C A202977 Column 6 of A202979
%H A202977 R. H. Hardin, <a href="/A202977/b202977.txt">Table of n, a(n) for n = 1..210</a>
%e A202977 Some solutions for n=4
%e A202977 ..1..1..1..1..0..0....0..1..1..1..1..0....0..0..1..1..1..1....0..1..1..1..1..0
%e A202977 ..1..1..1..1..1..1....1..1..1..1..1..1....1..1..1..1..0..1....1..1..0..1..1..1
%e A202977 ..0..1..1..1..1..1....1..1..1..0..1..1....1..1..1..1..1..1....1..1..0..1..1..1
%e A202977 ..0..1..1..0..1..1....1..1..0..0..0..0....0..1..1..1..0..0....0..1..1..1..0..0
%K A202977 nonn
%O A202977 1,2
%A A202977 _R. H. Hardin_ Dec 26 2011