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A222285 Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order 1
0, 4, 4, 35, 83, 532, 1427, 8540, 23798, 143594, 405187, 2455279, 6993039, 42590466, 121981025, 745909396, 2145554406, 13161790760, 37983541068, 233613349710, 675981684148, 4166412530876, 12082238135283, 74601934076542 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A222290

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A298681 A189743 A089542 * A222504 A226008 A145109

Adjacent sequences:  A222282 A222283 A222284 * A222286 A222287 A222288

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 14 2013

STATUS

approved

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Last modified October 21 04:00 EDT 2021. Contains 348141 sequences. (Running on oeis4.)