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A220304 Majority value maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal, vertical and antidiagonal neighbors in a random 0..1 nX2 array 1
2, 7, 26, 86, 291, 980, 3309, 11161, 37656, 127036, 428581, 1445887, 4877950, 16456589, 55519107, 187303144, 631899019, 2131818803, 7192053308, 24263615009, 81857431864, 276159968238, 931672620616, 3143156039330, 10603971469191 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A220308

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +a(n-2) -a(n-3) +6*a(n-4) +3*a(n-6) +3*a(n-7) -a(n-8) +3*a(n-9) -a(n-10)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A229241 A091145 A261332 * A212961 A000697 A027417

Adjacent sequences:  A220301 A220302 A220303 * A220305 A220306 A220307

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 10 2012

STATUS

approved

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Last modified February 21 19:50 EST 2018. Contains 299423 sequences. (Running on oeis4.)