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A220540 Equals one maps: number of 4Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 4Xn array 0
1, 96, 322, 6620, 42066, 541829, 4737799, 50261056, 476949627, 4828330418, 47120284988, 469126471434, 4617294604461 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 4 of A220537

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A048189 A304830 A301459 * A292345 A084048 A167983

Adjacent sequences:  A220537 A220538 A220539 * A220541 A220542 A220543

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 15 2012

STATUS

approved

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Last modified August 8 19:29 EDT 2020. Contains 336298 sequences. (Running on oeis4.)