A253833 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally

512, 6339, 52014, 284109, 156876, 295098, 262418, 218499, 347440, 571191, 845552, 1524398, 2858410, 5021094, 9662090, 18996817, 36633058, 72806768, 145731460, 290387182, 583234472, 1173787454, 2359763404, 4752830758, 9577047474

Offset

1,1

Comments

Diagonal of A253841

Links

R. H. Hardin, Table of n, a(n) for n = 1..29

Example

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

Crossrefs

Sequence in context: A017367 A254899 A258999 * A017487 A263034 A254012

Adjacent sequences: A253830 A253831 A253832 * A253834 A253835 A253836

Keyword

nonn

Author

R. H. Hardin, Jan 16 2015

Status

approved