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A220915 Equals one maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 nX4 array 0
8, 165, 3687, 61597, 1004213, 16172914, 259395789, 4155013023 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A220916

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A230916 A221078 A205577 * A033454 A181167 A205567

Adjacent sequences:  A220912 A220913 A220914 * A220916 A220917 A220918

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 24 2012

STATUS

approved

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Last modified June 30 22:18 EDT 2022. Contains 354945 sequences. (Running on oeis4.)