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A184373 1/3 the number of (n+1)X7 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.

%I A184373 #7 Jul 22 2025 09:31:50
%S A184373 420633,281803871,185547841629,122443114867993,80778452206783159,
%T A184373 53293289955084658949,35159890626610196979641,
%U A184373 23196517518911246631354055,15303755709562804997482560737,10096556166552290137769922123373
%N A184373 1/3 the number of (n+1)X7 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.
%C A184373 Column 6 of A184376
%H A184373 R. H. Hardin, <a href="/A184373/b184373.txt">Table of n, a(n) for n = 1..154</a>
%e A184373 Some solutions for 3X7 with a(1,1)=0
%e A184373 ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
%e A184373 ..1..2..2..0..0..0..0....1..1..2..0..0..0..1....1..1..0..0..0..0..1
%e A184373 ..1..1..2..0..2..0..0....0..0..2..0..2..0..0....0..1..0..1..0..2..1
%K A184373 nonn
%O A184373 1,1
%A A184373 _R. H. Hardin_ Jan 12 2011