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A220573 Equals one maps: number of n X n binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 n X n array 0
1, 8, 91, 17505, 3162375, 4239598056, 12835487766480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A220579

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A234280 A298013 A302614 * A303743 A187157 A332597

Adjacent sequences:  A220570 A220571 A220572 * A220574 A220575 A220576

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 16 2012

STATUS

approved

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Last modified September 21 00:14 EDT 2021. Contains 347596 sequences. (Running on oeis4.)