A258904 - OEIS

%I #5 Jun 14 2015 16:22:24

%S 2736,15416,86968,510095,2769733,14722533,77704089,402403692,

%T 2062226823,10488813781,52939478488,265527812185,1324994602509,

%U 6581490633215,32559651513057,160510299526305,788781424462817,3865274521037444

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

%C Column 2 of A258910

%H R. H. Hardin, <a href="/A258904/b258904.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

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

%Y Cf. A258910

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 14 2015