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A196449 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4 0
1, 6, 40, 594, 27320, 3707781, 926499600, 539621963877, 739769209147928 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Every 0 is next to 0 3's, every 1 is next to 1 0's, every 2 is next to 2 2's, every 3 is next to 3 4's, every 4 is next to 4 1's

Diagonal of A196456

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=4

..1..0..0..1....1..0..0..0....1..0..0..1....1..0..0..1....1..0..0..1

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

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

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

CROSSREFS

Sequence in context: A284195 A053677 A204563 * A281262 A186196 A196478

Adjacent sequences:  A196446 A196447 A196448 * A196450 A196451 A196452

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 02 2011

STATUS

approved

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Last modified February 22 09:40 EST 2019. Contains 320390 sequences. (Running on oeis4.)