A254513 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A254513

Number of (2+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

2703, 12324, 55667, 238740, 1038340, 4546393, 19754506, 85550331, 370307568, 1600037880, 6905546384, 29753763842, 128038285985, 550179273386, 2361021857130, 10118806677168, 43313794030418, 185189314116533

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Row 2 of A254512

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A153513 A333130 A214016 * A254506 A254813 A358430

Adjacent sequences: A254510 A254511 A254512 * A254514 A254515 A254516

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 31 2015

STATUS

approved