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A196803 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,2,3,0,1 for x=0,1,2,3,4 0
1, 1, 16, 193, 19449, 2535368, 1436535356, 2099296647197, 9043086011797968, 109561680407727718539 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

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

Diagonal of A196809

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

..0..0..0..0....0..3..0..0....0..0..0..0....0..0..0..0....0..3..0..0

CROSSREFS

Sequence in context: A120994 A016178 A081202 * A292785 A081185 A159517

Adjacent sequences: A196800 A196801 A196802 * A196804 A196805 A196806

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 06 2011

STATUS

approved

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Last modified November 28 00:05 EST 2022. Contains 358406 sequences. (Running on oeis4.)