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A221289 Equals two maps: number of nX6 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 nX6 array 0
12, 792, 48298, 2890017, 172905144, 10344276279, 618825190371, 37018574118868, 2214457259485909, 132469006243923162, 7924304243009714341, 474032340904538992523, 28356641623302251544461 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A221290

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A291999 A282437 A285150 * A341562 A155813 A220119

Adjacent sequences:  A221286 A221287 A221288 * A221290 A221291 A221292

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 2013

STATUS

approved

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Last modified May 6 14:16 EDT 2021. Contains 343586 sequences. (Running on oeis4.)