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A230985 Number of white square subarrays of (n+1)X(4+1) binary arrays with no element equal to a strict majority of its diagonal and antidiagonal neighbors, with upper left element zero 1
3, 5, 24, 47, 191, 396, 1573, 3317, 13176, 27805, 110739, 233632, 931361, 1965325, 7836336, 16538039, 65947255, 139182070, 555025545, 1171397043, 4671332880, 9859026059, 39316357723, 82978844636, 330908274229, 698396543107 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A230989

LINKS

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

FORMULA

Empirical: a(n) = 14*a(n-2) -61*a(n-4) +148*a(n-6) -289*a(n-8) +325*a(n-10) -227*a(n-12) +95*a(n-14) -28*a(n-16) +4*a(n-18)

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A200948 A275148 A336425 * A286427 A290509 A208800

Adjacent sequences:  A230982 A230983 A230984 * A230986 A230987 A230988

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 02 2013

STATUS

approved

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Last modified June 24 08:43 EDT 2021. Contains 345416 sequences. (Running on oeis4.)