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 A254798 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1

%I #4 Feb 08 2015 09:14:31

%S 2700,10484,46026,132639,479464,1478353,5237645,17246499,60236570,

%T 204026967,706743239,2418324163,8340069598,28629854395,98536216359,

%U 338578011548,1164370558418,4002071155295,13759672499086,47299540944711

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

%C Column 2 of A254804

%H R. H. Hardin, <a href="/A254798/b254798.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 08 2015

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