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A265458 T(n,k)=Number of nXk 0..n+k-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.

%I A265458 #4 Dec 09 2015 10:02:11
%S A265458 1,2,2,12,18,12,66,250,250,66,360,3358,7422,3358,360,1864,42282,
%T A265458 216466,216466,42282,1864,9358,502154,6056182,13943772,6056182,502154,
%U A265458 9358,45642,5710302,161435322,871209026,871209026,161435322,5710302,45642
%N A265458 T(n,k)=Number of nXk 0..n+k-2 arrays with each element differing from its horizontal and vertical neighbors by one or two.
%C A265458 Table starts
%C A265458 ....1.......2.........12............66..............360................1864
%C A265458 ....2......18........250..........3358............42282..............502154
%C A265458 ...12.....250.......7422........216466..........6056182...........161435322
%C A265458 ...66....3358.....216466......13943772........871209026.........52509347006
%C A265458 ..360...42282....6056182.....871209026.....122895678174......16879041018070
%C A265458 .1864..502154..161435322...52509347006...16879041018070....5327856426356284
%C A265458 .9358.5710302.4148236142.3073046007824.2268041942592142.1653688201339124766
%H A265458 R. H. Hardin, <a href="/A265458/b265458.txt">Table of n, a(n) for n = 1..144</a>
%e A265458 Some solutions for n=3 k=4
%e A265458 ..3..2..3..2....5..3..2..4....3..4..3..1....3..5..3..2....3..2..3..2
%e A265458 ..2..3..2..0....3..2..0..2....2..3..2..3....5..3..5..3....2..4..2..3
%e A265458 ..1..2..3..2....1..3..2..4....3..5..3..4....4..2..3..2....3..2..3..2
%K A265458 nonn,tabl
%O A265458 1,2
%A A265458 _R. H. Hardin_, Dec 09 2015