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A222451 Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
0, 2, 2, 17, 27, 194, 467, 2375, 6320, 31706, 84949, 426134, 1133626, 5776492, 15176513, 78547862, 204559282, 1071259196, 2775207035, 14655072445, 37875592694, 201114091282, 519500141148, 2768445005172, 7154712147158 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A222456

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A002567 A238289 A206095 * A000528 A260478 A074970

Adjacent sequences:  A222448 A222449 A222450 * A222452 A222453 A222454

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 20 2013

STATUS

approved

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Last modified April 20 16:17 EDT 2019. Contains 322310 sequences. (Running on oeis4.)