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A222667 Number of nX2 0..2 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
0, 0, 2, 9, 24, 80, 288, 1038, 3608, 12696, 45024, 160364, 571200, 2039424, 7297632, 26163672, 93938304, 337754400, 1215965472, 4382841504, 15814326912, 57117508992, 206479723776, 747042295968, 2704860854400, 9800596459776 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A222673

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....1..1

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

CROSSREFS

Sequence in context: A079997 A275260 A248436 * A122006 A200086 A143561

Adjacent sequences:  A222664 A222665 A222666 * A222668 A222669 A222670

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 28 2013

STATUS

approved

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Last modified January 18 15:09 EST 2022. Contains 350455 sequences. (Running on oeis4.)