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A198668 Number of nX7 0..4 arrays with values 0..4 introduced in row major order and each element equal to one or two horizontal and vertical neighbors 0
11, 21243, 40546053, 119026441960, 319298496941179 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A198669

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions with all values 0 to 4 for n=3

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

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

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

CROSSREFS

Sequence in context: A232066 A330301 A264917 * A346206 A198707 A198626

Adjacent sequences:  A198665 A198666 A198667 * A198669 A198670 A198671

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 28 2011

STATUS

approved

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Last modified December 4 05:56 EST 2021. Contains 349470 sequences. (Running on oeis4.)