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A198902 Number of nX4 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor 2

%I

%S 5,380,50384,6907736,948656912,130292546801,17895005957823,

%T 2457786852894234,337564362706067534,46362726246946052884,

%U 6367681611531782236418,874568266109492180669275

%N Number of nX4 0..4 arrays with values 0..4 introduced in row major order and no element equal to any horizontal or vertical neighbor

%C Column 4 of A198906

%H R. H. Hardin, <a href="/A198902/b198902.txt">Table of n, a(n) for n = 1..200</a>

%F Empirical: a(n) = 163*a(n-1) -3751*a(n-2) +32097*a(n-3) -120287*a(n-4) +201471*a(n-5) -148296*a(n-6) +38604*a(n-7)

%e Some solutions with values 0 to 4 for n=5

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

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

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

%e ..1..0..4..0....2..3..0..4....1..0..2..0....3..1..2..1....3..0..3..4

%e ..2..1..0..2....1..2..4..0....4..3..4..2....4..0..1..3....2..3..0..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 31 2011

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Last modified October 2 20:53 EDT 2022. Contains 357230 sequences. (Running on oeis4.)