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A251193 Number of (n+1)X(n+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 10,86,1654,73170,7392190,1688254298,871573835362,1016396169840162,

%T 2677928828235940878,15939286491629789077436,

%U 214333474893685389914820434,6511102783725658099829377229314,446854251204340727817177223022169346

%N Number of (n+1)X(n+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 Diagonal of A251201

%H R. H. Hardin, <a href="/A251193/b251193.txt">Table of n, a(n) for n = 1..20</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 30 2014

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Last modified May 16 21:13 EDT 2022. Contains 353720 sequences. (Running on oeis4.)