|
%I #4 Feb 10 2015 08:06:56
%S 2540,8944,35296,149931,516726,1662439,5009638,14250367,38915696,
%T 101553961,257394529,637368852,1541978175,3659178294,8544065101,
%U 19675806469,44760978714,100769983174,224782052971,497397948395
%N Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally and vertically
%C Column 2 of A254894
%H R. H. Hardin, <a href="/A254888/b254888.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..0..0..1....0..1..1..0....0..0..0..1....0..1..1..0....0..0..0..1
%e ..0..1..0..1....0..1..1..1....1..1..0..1....0..0..0..0....1..0..0..0
%e ..0..0..0..1....1..1..1..0....0..1..0..0....0..0..0..0....1..0..0..1
%e ..1..1..1..1....1..1..1..0....0..1..0..0....1..0..0..1....0..1..0..1
%e ..0..0..1..1....1..1..1..1....0..1..1..1....0..1..1..1....0..1..0..1
%e ..1..1..0..1....0..1..1..1....1..0..0..1....0..0..1..1....0..1..1..0
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 10 2015
| 