A258604 Number of (n+2)X(n+2) 0..2 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum

7500, 567009, 8093970, 26101881, 49848864, 125328025, 298341960, 718508025, 1487084440, 3114086416, 5819271930, 11046430404, 19155054072, 33797513281, 55343787840, 92261025025, 144373839480, 229977793600, 346828695130

Offset

1,1

Comments

Diagonal of A258612

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

Some solutions for n=1
..1..1..0....0..1..0....2..0..1....1..0..0....2..0..0....0..1..0....1..0..2
..1..2..1....2..1..1....1..0..2....2..2..2....2..2..0....1..2..2....1..2..2
..1..1..2....0..0..0....0..1..2....0..2..1....2..1..0....2..2..2....0..1..2

Crossrefs

Cf. A258612

Sequence in context: A252960 A258612 A258605 * A093225 A090742 A273382

Adjacent sequences: A258601 A258602 A258603 * A258605 A258606 A258607

Keyword

nonn

Author

R. H. Hardin, Jun 05 2015

Status

approved