A238027 - OEIS

%I #4 Feb 17 2014 07:20:15

%S 20,74,212,828,2312,9178,25652,102356,287960,1150916,3260168,13037240,

%T 37151120,148591610,425537780,1702102500,4894629560,19578333484,

%U 56494758872,225978330056,653985816944,2615940563620,7589574333512

%N Number of (1+2)X(n+2) 0..1 arrays with the (lower) medians of each row unequal to its neighbors and each column equal to its neighbors

%C Row 1 of A238026

%H R. H. Hardin, <a href="/A238027/b238027.txt">Table of n, a(n) for n = 1..167</a>

%e Some solutions for n=5

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 17 2014