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 A222501 Number of 2Xn 0..3 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1

%I #4 Feb 23 2013 07:04:30

%S 0,0,4,5,14,122,196,1861,4042,32952,75324,618635,1437882,11665906,

%T 28055204,220984129,550922114,4208027596,10854564024,80459791286,

%U 214468168532,1543792231764,4246718020040,29714960845675,84228546333542

%N Number of 2Xn 0..3 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Row 2 of A222500

%H R. H. Hardin, <a href="/A222501/b222501.txt">Table of n, a(n) for n = 1..45</a>

%e All solutions for n=4

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

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

%K nonn

%O 1,3

%A _R. H. Hardin_ Feb 23 2013

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Last modified August 13 04:16 EDT 2024. Contains 375113 sequences. (Running on oeis4.)