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A203058 Number of n X n 0..6 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor 0
1, 455, 3421817, 647485600638, 4668059982081633499, 1249342261879637139766649551 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A203066

LINKS

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

EXAMPLE

Some solutions for n=5

..2..6..3..0..0....4..2..2..6..4....2..3..3..5..2....3..4..4..3..6

..1..6..4..5..3....4..1..2..6..2....3..6..6..5..6....4..1..5..5..6

..4..6..2..5..6....2..5..0..6..6....0..5..2..6..6....6..2..1..4..5

..1..1..2..3..6....4..5..3..3..6....1..4..0..6..1....6..2..3..3..5

..0..6..6..0..6....6..6..0..4..4....4..4..1..6..2....4..0..4..4..1

CROSSREFS

Sequence in context: A061544 A015276 A145528 * A116331 A099650 A265493

Adjacent sequences:  A203055 A203056 A203057 * A203059 A203060 A203061

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 28 2011

STATUS

approved

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Last modified January 19 21:47 EST 2020. Contains 331066 sequences. (Running on oeis4.)