A231066 Number of black square subarrays of (n+1)X(n+1) binary arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors, with upper left element zero

1, 3, 11, 89, 685, 13785, 223270, 10204445, 367167586, 37025661591, 2960154980175, 660415936461789, 116764729695106769, 57661136320504955250, 22542682942448533813110, 24616708332260554368059831

Offset

1,2

Comments

Diagonal of A231070

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

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

Crossrefs

Sequence in context: A157980 A092148 A297485 * A091547 A063854 A066384

Adjacent sequences: A231063 A231064 A231065 * A231067 A231068 A231069

Keyword

nonn

Author

R. H. Hardin, Nov 03 2013

Status

approved