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

220, 2916, 20736, 161604, 726880, 4359744, 15444224, 78039556, 238216520, 1091641600, 3064541952, 13194657424, 35313510072, 145324113796, 378585527360, 1503409490496, 3856470856448, 14877667836964, 37794053212800

Offset

1,1

Comments

Diagonal of A258545

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

Some solutions for n=4
..0..1..1..1..1..0....1..0..0..0..0..0....1..1..0..1..1..0....1..1..0..1..0..1
..1..1..0..0..1..0....1..1..1..1..1..0....1..1..1..1..0..0....0..1..0..0..0..0
..0..1..1..1..1..0....0..0..0..0..0..1....0..0..0..1..1..0....0..1..0..1..1..1
..1..1..0..0..1..0....1..1..1..1..1..0....1..1..1..1..0..0....0..1..0..0..0..1
..0..1..1..1..1..0....0..0..0..0..0..1....0..0..0..1..1..0....0..1..0..1..1..1
..0..1..0..0..1..1....1..0..1..1..1..1....0..1..1..1..0..0....0..1..1..0..1..1

Crossrefs

Cf. A258545

Sequence in context: A257353 A211820 A215491 * A027797 A055663 A333139

Adjacent sequences: A258534 A258535 A258536 * A258538 A258539 A258540

Keyword

nonn

Author

R. H. Hardin, Jun 02 2015

Status

approved