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A220958 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..3 nX4 array 0
4, 76, 1769, 33708, 590009, 10032271, 165226050, 2688227848 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A220959
LINKS
EXAMPLE
Some solutions for n=3
..1..0..0..0....0..0..1..0....1..0..0..1....0..1..1..1....0..1..0..0
..0..0..1..0....0..0..0..1....0..0..0..0....0..1..0..0....0..1..1..1
..1..0..1..0....1..0..0..1....0..1..1..0....1..1..0..0....0..1..1..0
CROSSREFS
Sequence in context: A214814 A144210 A220793 * A187542 A364111 A009631
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 26 2012
STATUS
approved

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)