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A222506 Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

%I A222506 #6 Jul 23 2025 02:41:21
%S A222506 4,10,35,423,2066,23678,128889,1529195,8569032,102004630,577797690,
%T A222506 6918500106,39468519264,474774414486,2721664132317,32865146885501,
%U A222506 189103727308651,2290577790555642,13219410500639451,160529083824632284
%N A222506 Number of nX5 0..1 arrays with exactly floor(nX5/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
%C A222506 Column 5 of A222509
%H A222506 R. H. Hardin, <a href="/A222506/b222506.txt">Table of n, a(n) for n = 1..105</a>
%e A222506 Some solutions for n=3
%e A222506 ..0..1..0..0..0....0..0..0..1..1....0..0..1..1..1....0..0..1..1..1
%e A222506 ..1..0..0..0..0....0..0..0..1..0....0..0..1..1..1....0..1..1..1..1
%e A222506 ..0..0..0..0..0....0..0..0..1..1....1..0..1..1..1....1..1..1..1..1
%K A222506 nonn
%O A222506 1,1
%A A222506 _R. H. Hardin_ Feb 23 2013