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A185823 1/5 the number of n X 7 0..4 arrays with every element equal to exactly one or two of its horizontal and vertical neighbors. 0
65, 426928, 956312244, 2852526229300, 7662203273902712 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A185825.
LINKS
EXAMPLE
Some solutions for 4 X 7 with a(1,1)=0
..0..0..0..3..3..1..2....0..0..0..2..2..2..0....0..0..0..1..4..4..0
..0..1..0..1..2..1..2....0..1..0..1..1..0..0....0..1..0..1..3..3..0
..0..1..0..1..2..1..2....0..1..0..1..0..1..1....0..1..0..1..0..4..4
..0..0..0..1..0..0..2....0..0..0..1..0..0..0....0..0..0..1..0..3..3
CROSSREFS
Cf. A185825.
Sequence in context: A015072 A015039 A238612 * A035519 A368189 A238842
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 05 2011
STATUS
approved

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Last modified June 13 05:35 EDT 2024. Contains 373366 sequences. (Running on oeis4.)