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A208137 Number of n X n 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically 1
2, 16, 108, 900, 6300, 50176, 352800, 2722500, 19111950, 144288144, 1010017008, 7505103424, 52382558592, 384598425600, 2677165603200, 19473033306276, 135229397960250, 976281270250000, 6765629202832500, 48545357372612100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A208142

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..70

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A012024 A193217 A329550 * A207435 A301940 A058121

Adjacent sequences:  A208134 A208135 A208136 * A208138 A208139 A208140

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 23 2012

STATUS

approved

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Last modified September 24 04:19 EDT 2020. Contains 337317 sequences. (Running on oeis4.)