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A232344 Number of (n+1)X(n+1) 0..2 arrays with every element both >= and <= some horizontal, vertical, diagonal or antidiagonal neighbor 0
21, 5309, 6753291, 78572361735, 8085496134786969, 7094381639133025682975, 53109062021406984304908116217 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A232352

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A220620 A221120 A203370 * A074053 A220552 A275053

Adjacent sequences:  A232341 A232342 A232343 * A232345 A232346 A232347

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 22 2013

STATUS

approved

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Last modified January 20 21:46 EST 2022. Contains 350472 sequences. (Running on oeis4.)