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 A258537 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum 1

%I

%S 220,2916,20736,161604,726880,4359744,15444224,78039556,238216520,

%T 1091641600,3064541952,13194657424,35313510072,145324113796,

%U 378585527360,1503409490496,3856470856448,14877667836964,37794053212800

%N Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum

%C Diagonal of A258545

%H R. H. Hardin, <a href="/A258537/b258537.txt">Table of n, a(n) for n = 1..23</a>

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A258545

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 02 2015

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Last modified January 22 15:07 EST 2022. Contains 350481 sequences. (Running on oeis4.)