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Number of 5Xn 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once.
1

%I #4 Feb 20 2016 11:33:06

%S 0,103488,6712704,474091776,30541426560,1910809190712,116322554833728,

%T 6948456736101264,408916976890552416,23782890276972969552,

%U 1370013927382609217472,78294173211595616892096

%N Number of 5Xn 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once.

%C Row 5 of A269214.

%H R. H. Hardin, <a href="/A269218/b269218.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A269218/a269218.txt">Empirical recurrence of order 52</a>

%F Empirical recurrence of order 52 (see link above)

%e Some solutions for n=2

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

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

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

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

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

%Y Cf. A269214.

%K nonn

%O 1,2

%A _R. H. Hardin_, Feb 20 2016