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A222574 Number of 2Xn 0..2 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

%I A222574 #6 Jul 23 2025 02:47:02
%S A222574 2,1,5,10,25,128,292,1318,3640,14788,42332,172442,496654,2013238,
%T A222574 5919842,23613110,70986662,279047430,854262098,3317468446,10317918394,
%U A222574 39625082182,125013898578,475235749926,1518534868610,5720236047374
%N A222574 Number of 2Xn 0..2 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
%C A222574 Row 2 of A222573
%H A222574 R. H. Hardin, <a href="/A222574/b222574.txt">Table of n, a(n) for n = 1..65</a>
%e A222574 All solutions for n=3
%e A222574 ..0..0..0....0..0..1....0..0..0....0..0..0....0..1..1
%e A222574 ..0..0..1....0..0..0....0..0..0....1..0..0....1..1..1
%K A222574 nonn
%O A222574 1,1
%A A222574 _R. H. Hardin_ Feb 25 2013