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 A253994 Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1

%I #4 Jan 21 2015 20:20:03

%S 2736,13188,68176,350496,1738927,8730836,43840181,217514688,

%T 1076487005,5316416857,26147742882,128223160536,627281505519,

%U 3061322367965,14907228497301,72450268687501,351477169523845,1702262412004744

%N Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally

%C Row 2 of A253993

%H R. H. Hardin, <a href="/A253994/b253994.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 21 2015

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Last modified September 29 16:49 EDT 2023. Contains 365773 sequences. (Running on oeis4.)