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A185773 Number of (n+1)X4 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.

%I A185773 #7 Jul 22 2025 09:59:55
%S A185773 3844,89118,2046098,48744342,1154712762,27239862108,641595944400,
%T A185773 15156754839024,357869357090800,8446854770875602,199334639825139922,
%U A185773 4705555692884330894,111074885127703334276,2621814014876365014966
%N A185773 Number of (n+1)X4 0..2 arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum.
%C A185773 Column 3 of A185777
%H A185773 R. H. Hardin, <a href="/A185773/b185773.txt">Table of n, a(n) for n = 1..200</a>
%e A185773 Some solutions for 3X4
%e A185773 ..2..1..0..2....2..1..1..1....2..2..0..1....1..1..2..2....0..0..0..1
%e A185773 ..1..1..0..2....2..0..0..1....2..0..0..2....0..1..1..1....0..1..2..1
%e A185773 ..0..0..2..1....1..1..2..2....0..2..1..2....0..1..1..2....1..2..2..0
%K A185773 nonn
%O A185773 1,1
%A A185773 _R. H. Hardin_ Feb 03 2011