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A188825 Number of 3Xn binary arrays without the pattern 0 1 diagonally or antidiagonally 4

%I #4 Mar 31 2012 12:36:14

%S 8,16,48,144,432,1296,3888,11664,34992,104976,314928,944784,2834352,

%T 8503056,25509168,76527504,229582512,688747536,2066242608,6198727824,

%U 18596183472,55788550416,167365651248,502096953744,1506290861232

%N Number of 3Xn binary arrays without the pattern 0 1 diagonally or antidiagonally

%C Row 3 of A188824

%F Empirical: a(n) = 3*a(n-1) for n>2

%e Some solutions for 3X3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Apr 11 2011

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Last modified April 22 21:06 EDT 2024. Contains 371906 sequences. (Running on oeis4.)