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A197496 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 2,3,1,1,0 for x=0,1,2,3,4 0
1, 1, 22, 181, 7845, 755338, 182232300, 122868970059, 214646199763320 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

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

Diagonal of A197503

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A041932 A125359 A126517 * A107969 A248489 A248490

Adjacent sequences:  A197493 A197494 A197495 * A197497 A197498 A197499

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 15 2011

STATUS

approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)