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 A199225 Number of nX3 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors 1

%I #5 Mar 31 2012 12:36:35

%S 1,15,110,1114,10790,108608,1114424,11614563,122555420,1306096140,

%T 14036296174,151900593514,1653715009450,18096656251093,

%U 198923288701426,2195264844234822,24311220765553010,270073032889614065

%N Number of nX3 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors

%C Column 3 of A199230

%H R. H. Hardin, <a href="/A199225/b199225.txt">Table of n, a(n) for n = 1..58</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Nov 04 2011

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Last modified February 20 21:52 EST 2024. Contains 370219 sequences. (Running on oeis4.)