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A222576 Number of 4Xn 0..2 arrays with no more than floor(4Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order 0
14, 18, 120, 435, 3516, 25441, 212957, 1933819, 17971162, 172292518, 1649722196, 15907967878, 153952727468, 1485280127413, 14446587454682, 139301828808661, 1359137046700841 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 4 of A222573

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A328239 A186120 A065343 * A165228 A205866 A248134

Adjacent sequences:  A222573 A222574 A222575 * A222577 A222578 A222579

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 25 2013

STATUS

approved

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Last modified January 27 16:18 EST 2022. Contains 350608 sequences. (Running on oeis4.)