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A206236 Number of (n+1)X7 0..3 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order 1

%I #5 Mar 31 2012 12:37:10

%S 51066,170728,607008,9042600,118573968,1448239080,22535636736,

%T 303011941944,3712941210144,57939122017416,779043702707184,

%U 9545971851249384,148961482706745696,2002921359660139224

%N Number of (n+1)X7 0..3 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order

%C Column 6 of A206238

%H R. H. Hardin, <a href="/A206236/b206236.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = a(n-1) +2571*a(n-3) -2571*a(n-4) for n>10

%e Some solutions for n=4

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

%e ..0..2..0..0..2..0..0....1..0..0..1..0..0..1....0..1..0..0..3..2..2

%e ..1..0..0..2..0..0..2....2..3..0..0..1..0..0....2..0..0..3..2..2..1

%e ..0..0..1..0..0..3..1....2..2..1..0..0..1..1....0..0..1..2..2..3..0

%e ..3..3..0..0..2..1..1....3..2..2..3..0..1..2....3..3..2..2..3..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 05 2012

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Last modified March 28 14:21 EDT 2024. Contains 371254 sequences. (Running on oeis4.)