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A208877 Number of 6Xn 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors 1
187, 405481, 808928836, 1574432811027, 3057224057476808, 5935974611645510227, 11525604443642285224422, 22378818401741996203540140, 43452103699438321679996424291, 84369306929975201481569423835330 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A208872

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..56

EXAMPLE

Some solutions for n=4

..0..1..2..3....0..1..0..0....0..0..0..1....0..0..0..0....0..1..1..0

..0..1..2..0....2..2..1..2....2..3..2..0....1..1..1..0....0..0..1..1

..0..1..3..0....1..2..3..2....1..2..1..1....0..0..1..1....1..0..2..1

..2..0..3..0....0..3..0..0....1..0..2..1....1..0..0..2....1..1..0..3

..2..0..3..1....1..3..2..1....3..3..1..2....3..1..1..2....2..3..0..0

..1..2..0..2....1..2..1..2....0..2..3..1....0..2..0..0....0..2..1..3

CROSSREFS

Sequence in context: A223060 A208862 A208870 * A208173 A200799 A241118

Adjacent sequences: A208874 A208875 A208876 * A208878 A208879 A208880

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 02 2012

STATUS

approved

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Last modified January 31 21:52 EST 2023. Contains 359981 sequences. (Running on oeis4.)