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A196473 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,0,3,2,1 for x=0,1,2,3,4 0
1, 5, 7, 35, 151, 5955, 299659, 8943355, 528624118, 48720477449 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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

Diagonal of A196477

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A018353 A176958 A196203 * A081851 A342504 A192156

Adjacent sequences:  A196470 A196471 A196472 * A196474 A196475 A196476

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 03 2011

STATUS

approved

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Last modified January 19 06:18 EST 2022. Contains 350464 sequences. (Running on oeis4.)