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A221293 Equals two maps: number of 5Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 5Xn array 0
1, 114, 3332, 123958, 4983598, 172905144, 6138441061 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Row 5 of A221290

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A240386 A220332 A162675 * A306194 A112485 A220685

Adjacent sequences:  A221290 A221291 A221292 * A221294 A221295 A221296

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 2013

STATUS

approved

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Last modified July 25 12:15 EDT 2021. Contains 346290 sequences. (Running on oeis4.)