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A222763 Number of nX2 0..1 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order 1
0, 3, 4, 20, 48, 175, 512, 1719, 5400, 17776, 57420, 188656, 617176, 2033175, 6697744, 22139780, 73262232, 242931321, 806516560, 2681475048, 8925158440, 29740390672, 99196158144, 331163178475, 1106489052968, 3699881730900, 12380449027324 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A222769

LINKS

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

EXAMPLE

All solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A262033 A062870 A226964 * A306668 A300499 A151419

Adjacent sequences:  A222760 A222761 A222762 * A222764 A222765 A222766

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 05 2013

STATUS

approved

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Last modified July 6 02:23 EDT 2022. Contains 355108 sequences. (Running on oeis4.)