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A222887 Number of nX4 0..2 arrays with exactly floor(nX4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order 1

%I

%S 6,184,8986,465938,24893100,1351294947,74202775749,4110642829357,

%T 229305087108268,12863027320889786,724874553417397463,

%U 41005626962099741403,2327182744071959475216,132441294546405471753370

%N Number of nX4 0..2 arrays with exactly floor(nX4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order

%C Column 4 of A222889

%H R. H. Hardin, <a href="/A222887/b222887.txt">Table of n, a(n) for n = 1..44</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 08 2013

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Last modified January 28 18:56 EST 2022. Contains 350657 sequences. (Running on oeis4.)