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A223127 Number of 2Xn 0..2 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
2, 10, 64, 489, 3599, 27803, 212771, 1656545, 12904694, 101255205, 796288843, 6286246396, 49736262634, 394474774687, 3134464364251, 24950223830205, 198897142545467, 1587722400605459, 12689418744067169, 101527684281703007 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 2 of A223126

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..29

EXAMPLE

Some solutions for n=3

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

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

CROSSREFS

Sequence in context: A186268 A078531 A319360 * A323666 A318814 A130721

Adjacent sequences: A223124 A223125 A223126 * A223128 A223129 A223130

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 15 2013

STATUS

approved

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Last modified January 28 02:32 EST 2023. Contains 359849 sequences. (Running on oeis4.)