A220793 - OEIS

A220793

Equals two maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 nX4 array

4, 76, 1753, 32507, 563715, 9507244, 156493963, 2544887030

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OFFSET

1,1

COMMENTS

Column 4 of A220794

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A093184 A214814 A144210 * A220958 A187542 A364111

Adjacent sequences: A220790 A220791 A220792 * A220794 A220795 A220796

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 21 2012

STATUS

approved