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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
1, 3, 11, 89, 685, 13785, 223270, 10204445, 367167586, 37025661591, 2960154980175, 660415936461789, 116764729695106769, 57661136320504955250, 22542682942448533813110, 24616708332260554368059831 (list; graph; refs; listen; history; text; internal format)
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

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Last modified July 8 03:38 EDT 2020. Contains 335504 sequences. (Running on oeis4.)