|
%I #6 Feb 10 2015 07:51:08
%S 2540,7212,23295,81959,261188,806538,2368198,6624259,17894542,
%T 46475759,117362361,289972349,700430787,1660287016,3874041941,
%U 8916784297,20277482009,45635984351,101763767073,225107832296,494489541033
%N Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally
%C Row 2 of A254020
%H R. H. Hardin, <a href="/A254021/b254021.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..1..1..0..0..1..1....1..0..0..1..0..0....0..1..1..1..1..1....0..1..1..0..0..1
%e ..0..1..0..1..0..1....1..0..1..1..0..1....1..0..0..1..1..1....1..1..1..0..1..1
%e ..0..1..0..1..0..1....1..0..1..0..0..1....0..0..1..1..0..0....0..0..0..0..1..0
%e ..0..1..1..0..0..1....0..1..1..0..1..1....0..1..1..1..1..1....0..0..1..1..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 22 2015
| 