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A198527 Number of nX7 0..4 arrays with values 0..4 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors 0
855, 47436498, 3201911378187, 217885196778717007, 14827770532074166305565, 1009078065869144136137180812 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A198528

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=4

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

..1..1..0..0..2..1..3....1..1..0..0..2..4..1....1..1..0..0..2..3..0

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

..0..0..1..0..0..3..4....0..0..1..0..0..0..4....0..0..1..0..0..0..3

CROSSREFS

Sequence in context: A100969 A183998 A209502 * A234885 A251453 A087002

Adjacent sequences:  A198524 A198525 A198526 * A198528 A198529 A198530

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 26 2011

STATUS

approved

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Last modified August 8 12:30 EDT 2022. Contains 356009 sequences. (Running on oeis4.)