A254234 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally and vertically

512, 9209, 195528, 5606832, 68909819, 940766774, 9935634151, 77884261083, 876908175172, 7135292444845, 54154222470357, 571074987706539, 4540506562937008

Offset

1,1

Comments

Diagonal of A254242

Links

Table of n, a(n) for n=1..13.

Example

Some solutions for n=3
..0..0..0..0..0....0..0..1..0..1....0..0..0..1..1....0..0..0..0..1
..0..0..0..1..0....1..0..0..0..0....0..0..0..0..1....1..0..0..0..1
..0..1..1..1..1....0..0..1..1..0....0..1..0..1..1....0..0..1..1..1
..0..0..0..1..1....0..0..0..0..0....1..0..0..1..1....1..1..1..1..1
..0..1..1..1..0....0..0..1..1..0....1..0..1..1..0....0..1..1..1..0

Crossrefs

Sequence in context: A253928 A254887 A256896 * A254546 A255028 A247932

Adjacent sequences: A254231 A254232 A254233 * A254235 A254236 A254237

Keyword

nonn

Author

R. H. Hardin, Jan 27 2015

Status

approved