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A251196 Number of (n+1)X(3+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements 1

%I

%S 64,310,1654,8976,49104,268638,1470646,8050116,44068836,241240750,

%T 1320610882,7229316556,39574952216,216642298190,1185949599142,

%U 6492159224596,35539565353052,194551710683166,1065020576904442

%N Number of (n+1)X(3+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements

%C Column 3 of A251201

%H R. H. Hardin, <a href="/A251196/b251196.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 2*a(n-1) +19*a(n-2) +8*a(n-3) -41*a(n-4) -16*a(n-5) +21*a(n-6) -10*a(n-8) +2*a(n-9) for n>10

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 30 2014

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Last modified July 3 16:27 EDT 2022. Contains 355055 sequences. (Running on oeis4.)