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A208405 Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors 1

%I

%S 51,41914,40883360,40039156736,39216100214432,38410047476679936,

%T 37620564383817645696,36847308431734650845696,

%U 36089946042522268966513152,35348150537672718536490582016,34621601954234065647421901637632

%N Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors

%C Column 5 of A208408

%H R. H. Hardin, <a href="/A208405/b208405.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 1008*a(n-1) -28108*a(n-2) +138160*a(n-3) -223680*a(n-4) +168192*a(n-5) -55296*a(n-6) for n>7

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 26 2012

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Last modified October 5 03:25 EDT 2022. Contains 357240 sequences. (Running on oeis4.)