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A220285 Equals one maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and vertical neighbors in a random 0..1 nX4 array 0
8, 96, 1411, 15382, 232795, 3061937, 40463019, 533004621 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A220287

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A173834 A260627 A098430 * A034177 A052570 A002168

Adjacent sequences:  A220282 A220283 A220284 * A220286 A220287 A220288

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 09 2012

STATUS

approved

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Last modified January 29 01:54 EST 2020. Contains 331328 sequences. (Running on oeis4.)