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A205025 Number of (n+1)X7 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards 1

%I

%S 2470216,888172440,139786868632,42501311863619,8486771114466915,

%T 2391551925319245318,566608180773299047113,155382071318023786051201,

%U 40101253859407159274129669,10933319692657383714277445869

%N Number of (n+1)X7 0..3 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards

%C Column 6 of A205027

%H R. H. Hardin, <a href="/A205025/b205025.txt">Table of n, a(n) for n = 1..104</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 21 2012

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Last modified January 19 08:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)