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 A231062 Number of nX7 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero 1

%I

%S 0,778,47998,3607664,270096962,20286249268,1524513500124,

%T 114623595936566,8620079317973610,648336326622533098,

%U 48765953333817735404,3668154457146990333796,275921956841908575609620

%N Number of nX7 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero

%C Column 7 of A231063

%H R. H. Hardin, <a href="/A231062/b231062.txt">Table of n, a(n) for n = 1..26</a>

%e Some solutions for n=4

%e ..0..1..0..3..2..3..2....0..1..0..1..0..3..2....0..1..0..3..0..3..0

%e ..1..2..1..0..3..0..3....1..2..1..2..1..2..1....1..2..1..0..1..2..1

%e ..0..3..0..3..0..1..2....0..3..0..3..0..1..2....0..3..2..3..2..3..0

%e ..3..0..1..2..1..0..3....1..2..1..2..1..0..3....3..0..1..0..1..2..1

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 03 2013

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Last modified March 25 22:22 EDT 2023. Contains 361529 sequences. (Running on oeis4.)