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A220994 Majority value maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 2Xn array 1
1, 10, 44, 168, 642, 2463, 9454, 36363, 139880, 538092, 2069817, 7961603, 30624506, 117797841, 453112757, 1742910881, 6704156588, 25787728116, 99193227204, 381549556196, 1467641171329, 5645323318604, 21714895989511, 83526962265404 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 2 of A220993

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) +3*a(n-2) -16*a(n-3) +3*a(n-4) +25*a(n-5) -12*a(n-6) -16*a(n-7) +4*a(n-9) +40*a(n-10) -16*a(n-11) -16*a(n-12)

EXAMPLE

Some solutions for n=3

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

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

CROSSREFS

Sequence in context: A200448 A124852 A220923 * A097416 A076373 A097215

Adjacent sequences:  A220991 A220992 A220993 * A220995 A220996 A220997

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 28 2012

STATUS

approved

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Last modified September 21 15:47 EDT 2021. Contains 347598 sequences. (Running on oeis4.)