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A222765 Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

%I A222765 #6 Jul 23 2025 03:02:10
%S A222765 3,11,66,465,3431,25772,196185,1508369,11685222,91068653,713197411,
%T A222765 5607868082,44244333098,350085423285,2776997948510,22076166728109,
%U A222765 175834747565068,1402892278684566,11209941707509701,89696333927946099
%N A222765 Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
%C A222765 Column 4 of A222769
%H A222765 R. H. Hardin, <a href="/A222765/b222765.txt">Table of n, a(n) for n = 1..210</a>
%e A222765 Some solutions for n=3
%e A222765 ..0..0..0..1....0..0..0..0....0..0..0..1....0..1..0..1....0..0..0..0
%e A222765 ..0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..0....0..0..0..1
%e A222765 ..0..0..1..1....1..0..1..1....0..1..0..0....0..0..0..0....0..1..0..1
%K A222765 nonn
%O A222765 1,1
%A A222765 _R. H. Hardin_ Mar 05 2013