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A196422 Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than itself 0
1, 23, 1377, 1436945, 9212529925, 474961518391793, 200900509921996396385 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A196430

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A201309 A049003 A268961 * A248703 A264903 A003281

Adjacent sequences:  A196419 A196420 A196421 * A196423 A196424 A196425

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 02 2011

STATUS

approved

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Last modified February 21 01:09 EST 2019. Contains 320363 sequences. (Running on oeis4.)