A253955 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal median minus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally

2992, 20868, 148332, 1048679, 7777096, 56216811, 413408572, 3015389036, 22143665791, 162054099330, 1189259937083, 8714159522541, 63925042957075, 468631209766465, 3437131289287563, 25202282873611349, 184828179810768099

Offset

1,1

Comments

Column 2 of A253961

Links

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

Example

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

Crossrefs

Sequence in context: A317398 A346221 A253962 * A253758 A230013 A158963

Adjacent sequences: A253952 A253953 A253954 * A253956 A253957 A253958

Keyword

nonn

Author

R. H. Hardin, Jan 20 2015

Status

approved