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A207398 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically 1
2, 16, 102, 729, 4212, 26896, 154580, 970225, 5697150, 36000000, 216023850, 1377968641, 8411571224, 54080432704, 334469528520, 2163643890489, 13517662791690, 87865126849600, 553380551724110, 3610810383420361 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A207403

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A197800 A209645 A207062 * A207699 A207902 A267713

Adjacent sequences:  A207395 A207396 A207397 * A207399 A207400 A207401

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 17 2012

STATUS

approved

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Last modified December 1 16:44 EST 2021. Contains 349430 sequences. (Running on oeis4.)