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A201538 Number of nX7 0..2 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor 1
18, 899, 72811, 9526987, 1408677515, 208164634003, 28456420346436, 3505159734744220, 387870239576486118, 38812326822498760643, 3543738686502556683539, 297838575975499416278867 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A201539

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..14

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A049655 A145615 A215194 * A214160 A242446 A160013

Adjacent sequences:  A201535 A201536 A201537 * A201539 A201540 A201541

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 02 2011

STATUS

approved

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Last modified June 16 04:31 EDT 2021. Contains 345055 sequences. (Running on oeis4.)