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A231133 Number of (n+1)X(n+1) black-square subarrays of 0..2 arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order 0
1, 9, 308, 27171, 6794904, 4509445997, 8349491299560, 41122867660973690, 564457878709147238868, 20611335365445954476620968, 2097381737046509117354544061212, 567772314049031950964995256826728363 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A231137

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

..x..0..x..1..x....x..0..x..1..x....x..0..x..0..x....x..0..x..0..x

..2..x..0..x..2....1..x..2..x..2....1..x..0..x..1....0..x..1..x..2

..x..0..x..1..x....x..0..x..0..x....x..1..x..1..x....x..2..x..1..x

..1..x..0..x..0....2..x..1..x..2....0..x..2..x..0....1..x..2..x..1

..x..2..x..1..x....x..0..x..1..x....x..2..x..2..x....x..0..x..0..x

CROSSREFS

Sequence in context: A279449 A152437 A296802 * A163702 A160194 A217145

Adjacent sequences:  A231130 A231131 A231132 * A231134 A231135 A231136

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2013

STATUS

approved

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Last modified December 9 17:18 EST 2019. Contains 329879 sequences. (Running on oeis4.)