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A222998 Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
10, 272, 11114, 486262, 21692365, 982879508, 45079248621, 2086133257739, 97208417340361, 4554539931346382, 214352375573013156, 10125794195099126318, 479840435995427044060, 22800045065517001638699, 1085898615393818008179596 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A223000

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..58

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A287317 A084943 A055055 * A221526 A153331 A290202

Adjacent sequences:  A222995 A222996 A222997 * A222999 A223000 A223001

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 11 2013

STATUS

approved

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Last modified December 3 17:09 EST 2021. Contains 349467 sequences. (Running on oeis4.)