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A222685 Number of nX3 0..2 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
0, 4, 32, 420, 2050, 32296, 159672, 2593768, 13108760, 215573760, 1103125848, 18291819408, 94349236032, 1574003841792, 8162910172992, 136816063935552, 712336725800320, 11983316167337728, 62579289627023616, 1055874509971768576 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A222690

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A229548 A005172 A298694 * A322735 A140178 A088991

Adjacent sequences:  A222682 A222683 A222684 * A222686 A222687 A222688

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 28 2013

STATUS

approved

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Last modified September 20 19:02 EDT 2021. Contains 347588 sequences. (Running on oeis4.)