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A222669 Number of nX4 0..2 arrays with exactly floor(nX4/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
3, 9, 40, 348, 2370, 20606, 212842, 2134959, 21085549, 211716164, 2136631932, 21522095442, 217024139551, 2193065402495, 22187387560680, 224679112979344, 2277631748750522, 23112487299379689, 234748284433308243 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A222673

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..126

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A346753 A233533 A190341 * A179088 A027893 A018417

Adjacent sequences:  A222666 A222667 A222668 * A222670 A222671 A222672

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 28 2013

STATUS

approved

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Last modified May 16 15:56 EDT 2022. Contains 353706 sequences. (Running on oeis4.)