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A220327 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..1 nX6 array 0
12, 658, 29467, 1335202, 59893608, 2680626797, 119808040854, 5350328821481 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A220328

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A071307 A195574 A195554 * A281780 A295870 A177322

Adjacent sequences:  A220324 A220325 A220326 * A220328 A220329 A220330

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 10 2012

STATUS

approved

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Last modified July 30 07:58 EDT 2021. Contains 346348 sequences. (Running on oeis4.)