A254518 Number of (7+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

2977462, 38770022, 412719610, 4179100619, 55061190276, 695661729709, 8348810077730, 102339687375431, 1244134654250986, 15035366666508525, 180762598329110242, 2171453851080392485, 25981429998893241830

Offset

1,1

Comments

Row 7 of A254512

Links

R. H. Hardin, Table of n, a(n) for n = 1..60

Example

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

Crossrefs

Sequence in context: A233652 A239918 A254511 * A254818 A065427 A017406

Adjacent sequences: A254515 A254516 A254517 * A254519 A254520 A254521

Keyword

nonn

Author

R. H. Hardin, Jan 31 2015

Status

approved