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A190658 Half the number of n X n symmetric binary matrices with no element unequal to a strict majority of its vertical, antidiagonal and horizontal neighbors 1
1, 1, 3, 8, 38, 252, 2107, 22478, 331824, 6625044, 173531500, 6026107049, 280634679581, 17440962165250, 1440182982082321, 158309818157320775, 23213155114911168104, 4535580909418217659991, 1179764335891702406715256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..24

EXAMPLE

Some solutions for n=5 with a(1,1)=0

..0..0..1..1..1....0..0..1..0..0....0..0..0..1..1....0..0..1..1..1

..0..1..1..1..0....0..1..1..0..0....0..0..0..1..1....0..1..1..1..1

..1..1..1..0..0....1..1..1..1..1....0..0..1..1..1....1..1..1..1..1

..1..1..0..0..1....0..0..1..1..0....1..1..1..1..1....1..1..1..1..0

..1..0..0..1..1....0..0..1..0..0....1..1..1..1..1....1..1..1..0..0

CROSSREFS

Sequence in context: A089066 A099030 A264657 * A106558 A065914 A288759

Adjacent sequences:  A190655 A190656 A190657 * A190659 A190660 A190661

KEYWORD

nonn

AUTHOR

R. H. Hardin May 16 2011

STATUS

approved

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Last modified April 19 19:00 EDT 2019. Contains 322290 sequences. (Running on oeis4.)