cp's OEIS Frontend

A184372 1/3 the number of (n+1)X6 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.

%I A184372 #7 Jul 22 2025 09:31:43
%S A184372 58077,15754461,4210059673,1127256514575,301753233626727,
%T A184372 80778452206783159,21624059735461675335,5788675585887326994869,
%U A184372 1549605510397241533259837,414823258633731476239250435
%N A184372 1/3 the number of (n+1)X6 0..2 arrays with every 2X2 subblock having at least two equal elements connected horizontally or vertically.
%C A184372 Column 5 of A184376
%H A184372 R. H. Hardin, <a href="/A184372/b184372.txt">Table of n, a(n) for n = 1..200</a>
%e A184372 Some solutions for 3X6 with a(1,1)=0
%e A184372 ..0..0..0..0..2..1....0..0..0..0..2..1....0..0..0..0..0..2....0..0..0..0..0..0
%e A184372 ..2..0..0..0..1..1....2..0..0..0..0..0....0..0..0..1..0..0....2..0..0..1..0..2
%e A184372 ..1..1..1..0..1..2....2..0..2..0..0..2....1..1..2..2..2..0....1..0..2..1..0..0
%K A184372 nonn
%O A184372 1,1
%A A184372 _R. H. Hardin_ Jan 12 2011