A256740 - OEIS

A256740

Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 3 and no antidiagonal sum 3 and no row sum 0 and no column sum 0

153, 570, 2992, 5888, 22080, 72192, 404480, 897280, 4353536, 14508288, 119161088, 528994560, 4198855680, 110906421504, 711119970816, 7163830821120, 725781597115392, 5138241788813568, 58548192656601856, 21076849186784276736

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OFFSET

1,1

COMMENTS

Diagonal of A256748

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..33

EXAMPLE

Some solutions for n=4

..0..1..1..1..1..0....0..1..0..0..1..0....1..1..0..0..1..0....0..1..1..1..1..1

..1..1..0..0..1..1....1..1..0..0..1..1....1..0..1..1..1..1....1..0..1..0..0..1

..0..0..1..1..0..0....0..0..1..1..1..0....0..1..0..0..1..0....0..0..1..0..0..1

..1..1..0..0..1..1....1..1..0..0..1..1....0..1..0..0..1..0....1..1..1..1..1..1

..0..0..1..1..0..0....0..1..1..1..1..0....1..1..1..1..1..1....0..0..1..0..0..1

..1..1..0..0..1..1....0..1..0..0..1..1....1..1..0..0..1..0....0..0..1..0..0..1

CROSSREFS

Cf. A256748

Sequence in context: A246629 A371082 A325376 * A199851 A181775 A193249

Adjacent sequences: A256737 A256738 A256739 * A256741 A256742 A256743

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 09 2015

STATUS

approved