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A196011 Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors within one of itself 0
1, 1, 2, 25, 106, 708, 22711, 670449, 44864449, 5122273171, 1106078073333, 426788297174150 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Diagonal of A196017

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A123012 A175522 A226418 * A080515 A258943 A009381

Adjacent sequences:  A196008 A196009 A196010 * A196012 A196013 A196014

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 26 2011

STATUS

approved

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Last modified July 4 16:24 EDT 2020. Contains 335448 sequences. (Running on oeis4.)