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A183602 1/6 the number of (n+1)X9 0..2 arrays with every 2X2 subblock containing all three values.

%I A183602 #7 Jul 22 2025 09:08:13
%S A183602 209304,30539367,3823553752,495215814566,63854542807704,
%T A183602 8251614370134644,1066653925785997106,137936054886331468840,
%U A183602 17840841964756696807680,2307848389145766144487866,298559730522953008074518020
%N A183602 1/6 the number of (n+1)X9 0..2 arrays with every 2X2 subblock containing all three values.
%C A183602 Column 8 of A183603
%H A183602 R. H. Hardin, <a href="/A183602/b183602.txt">Table of n, a(n) for n = 1..40</a>
%e A183602 Some solutions with a(1,1)=0 for 3X9
%e A183602 ..0..0..0..0..0..1..1..1..0....0..0..0..0..0..0..0..2..0
%e A183602 ..1..2..1..2..1..2..0..2..1....1..2..1..2..1..2..1..1..2
%e A183602 ..2..0..0..0..0..0..1..2..0....0..2..0..0..1..0..2..0..2
%K A183602 nonn
%O A183602 1,1
%A A183602 _R. H. Hardin_ Jan 05 2011