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A183249 Half the number of nX3 binary arrays with the number of 1-1 adjacencies equal to the number of 0-0 adjacencies 1
1, 6, 25, 164, 1092, 7954, 57519, 429936, 3205504, 24288784, 184062519, 1407419548, 10773952376, 82925706270, 639182387805, 4944237734904, 38299501221912, 297409232997320, 2312508964364352, 18013343447396448, 140477702503827052 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A183253

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..100

EXAMPLE

Some solutions with a(1,1)=0 for 3X3

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

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

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

CROSSREFS

Sequence in context: A009464 A042529 A323132 * A199008 A090566 A041064

Adjacent sequences:  A183246 A183247 A183248 * A183250 A183251 A183252

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 2011

STATUS

approved

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Last modified September 24 01:21 EDT 2020. Contains 337315 sequences. (Running on oeis4.)