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A198665 Number of nX4 0..4 arrays with values 0..4 introduced in row major order and each element equal to one or two horizontal and vertical neighbors 1

%I

%S 2,65,2715,199923,16089057,1382332582,119026441960,10314841920242,

%T 893422225702521,77438142132961570,6711121950891144754,

%U 581664320030297340439,50412657929233287557664,4369297837622133342788917

%N Number of nX4 0..4 arrays with values 0..4 introduced in row major order and each element equal to one or two horizontal and vertical neighbors

%C Column 4 of A198669

%H R. H. Hardin, <a href="/A198665/b198665.txt">Table of n, a(n) for n = 1..74</a>

%e Some solutions with all values 0 to 4 for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 28 2011

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Last modified November 28 21:30 EST 2021. Contains 349415 sequences. (Running on oeis4.)