A253502 Number of (n+2)X(n+2) 0..1 arrays with every 2X2 and 3X3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically

132, 472, 1332, 3400, 7948, 17888, 38564, 82200, 171236, 356736, 732740, 1511840, 3087196, 6341584, 12914820, 26464792, 53815684, 110096960, 223649540, 456951728, 927483412, 1892890832, 3839327172, 7827922160, 15867349668

Offset

1,1

Comments

Diagonal of A253510

Links

R. H. Hardin, Table of n, a(n) for n = 1..68

Example

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

Crossrefs

Sequence in context: A064059 A244103 A248555 * A257105 A204834 A241288

Adjacent sequences: A253499 A253500 A253501 * A253503 A253504 A253505

Keyword

nonn

Author

R. H. Hardin, Jan 02 2015

Status

approved