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A222283 Number of nX1 0..1 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order 5
1, 0, 0, 3, 4, 4, 5, 20, 27, 48, 63, 175, 236, 512, 684, 1719, 2320, 5400, 7271, 17776, 24036, 57420, 77636, 188656, 255591, 617176, 836595, 2033175, 2759184, 6697744, 9094949, 22139780, 30086955, 73262232, 99615081, 242931321, 330503120 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Column 1 of A222290

LINKS

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

EXAMPLE

All solutions for n=4

..0....0....0

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

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

..1....1....1

CROSSREFS

Sequence in context: A028263 A059179 A279678 * A336094 A182487 A309530

Adjacent sequences:  A222280 A222281 A222282 * A222284 A222285 A222286

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 14 2013

STATUS

approved

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Last modified September 30 20:19 EDT 2020. Contains 337440 sequences. (Running on oeis4.)