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 A205763 Number of (n+1)X4 0..3 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors 1

%I #5 Mar 31 2012 12:37:07

%S 8659,274013,9909258,375857889,14312320196,545700470559,

%T 20808476912916,793486314120669,30257997968098894,1153827416366199522,

%U 43998894299268852777,1677809126003982433476,63979878224491463514492

%N Number of (n+1)X4 0..3 arrays with every 2X2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors

%C Column 3 of A205768

%H R. H. Hardin, <a href="/A205763/b205763.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for 5X5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 30 2012

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Last modified August 8 15:25 EDT 2024. Contains 375022 sequences. (Running on oeis4.)