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A222516 Number of nX2 0..3 arrays with exactly floor(nX2/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order 1

%I #5 Feb 23 2013 17:20:50

%S 0,0,0,9,0,114,0,1881,0,33828,0,624019,0,11640594,0,218436985,0,

%T 4115818812,0,77807963106,0,1475137178140,0,28037418382435,0,

%U 534101042736588,0,10195012207704303,0,194958882346128666,0

%N Number of nX2 0..3 arrays with exactly floor(nX2/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order

%C Column 2 of A222522

%H R. H. Hardin, <a href="/A222516/b222516.txt">Table of n, a(n) for n = 1..210</a>

%e All solutions for n=4

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

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

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

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

%K nonn

%O 1,4

%A _R. H. Hardin_ Feb 23 2013

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Last modified May 27 20:38 EDT 2024. Contains 372882 sequences. (Running on oeis4.)