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A222271 Number of nX3 0..3 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order 1

%I #4 Feb 14 2013 05:29:05

%S 0,4,4,81,364,5996,27980,507909,2380692,44501178,208717216,3948025953,

%T 18510211252,352744650956,1653908717680,31689827693324,

%U 148654828631998,2860214905912758,13427178703144724,259196177077920492

%N Number of nX3 0..3 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order

%C Column 3 of A222275

%H R. H. Hardin, <a href="/A222271/b222271.txt">Table of n, a(n) for n = 1..125</a>

%e All solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Feb 14 2013

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Last modified March 1 13:16 EST 2024. Contains 370433 sequences. (Running on oeis4.)