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A222510 Number of 2Xn 0..1 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

%I A222510 #6 Jul 23 2025 02:41:49
%S A222510 0,0,4,3,10,32,44,176,326,888,2076,5275,12306,32324,74284,195959,
%T A222510 460498,1189652,2861016,7307596,17774488,45231012,110756056,281073368,
%U A222510 692630902,1752734824,4342317676,10967047059,27278066490,68820679380,171685581996
%N A222510 Number of 2Xn 0..1 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
%C A222510 Row 2 of A222509
%H A222510 R. H. Hardin, <a href="/A222510/b222510.txt">Table of n, a(n) for n = 1..123</a>
%e A222510 All solutions for n=3
%e A222510 ..0..0..1....0..0..0....0..1..1....0..0..0
%e A222510 ..0..0..0....0..0..1....1..1..1....1..0..0
%K A222510 nonn
%O A222510 1,3
%A A222510 _R. H. Hardin_ Feb 23 2013