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A208200
Number of nX7 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or left-upward diagonal neighbors
1
715, 10215440, 153402542384, 2303673397508915, 34594950233928279876, 519522527116810577984260, 7801822458198433796561428608, 117162260457319989881048135168019, 1759460094015764611132758812387283596
OFFSET
1,1
COMMENTS
Column 7 of A208201
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..1..0..1..0....0..1..2..3..0..1..2....0..0..0..0..0..0..0
..2..2..1..0..3..1..0....0..0..1..3..0..2..0....0..1..0..1..2..3..2
..1..0..0..0..1..2..0....3..0..2..0..3..1..1....2..0..2..1..0..1..2
..3..3..0..1..0..1..2....2..0..2..0..1..0..3....1..3..2..1..3..0..3
CROSSREFS
Sequence in context: A208878 A208174 A200800 * A208407 A208414 A214237
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2012
STATUS
approved