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A223050 Number of nX4 0..3 arrays with exactly floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
6, 508, 95648, 17704612, 3345698159, 642902149269, 125023235986060, 24532345137855558, 4847658520889741087, 963306978592566283718, 192306743440029495693971, 38537949083984617104985257 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A223052

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..23

EXAMPLE

Some solutions for n=3

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

..2..3..2..1....0..2..3..0....2..1..1..3....3..3..3..1....0..0..0..1

..3..1..0..3....1..2..2..0....0..1..0..0....2..2..3..2....3..1..3..2

CROSSREFS

Sequence in context: A013975 A272094 A103520 * A290937 A250391 A003395

Adjacent sequences:  A223047 A223048 A223049 * A223051 A223052 A223053

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 13 2013

STATUS

approved

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Last modified October 18 23:24 EDT 2021. Contains 348070 sequences. (Running on oeis4.)