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A222535 Number of nX2 0..1 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order 2
1, 1, 5, 16, 29, 78, 236, 638, 1515, 4345, 11927, 32187, 84684, 238656, 646520, 1771466, 4811845, 13396324, 36540256, 100927019, 277135515, 768770834, 2113207392, 5856167133, 16164388090, 44845294779, 123927192659, 344021294163 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A222541

LINKS

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

EXAMPLE

All solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A299882 A212457 A134594 * A063076 A270805 A132479

Adjacent sequences:  A222532 A222533 A222534 * A222536 A222537 A222538

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 24 2013

STATUS

approved

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Last modified February 20 22:51 EST 2019. Contains 320362 sequences. (Running on oeis4.)