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A197063 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,1,3,0,2 for x=0,1,2,3,4 0
1, 5, 76, 3466, 645970, 387792259, 814152081238, 5880410307808966, 145748906353392828573 (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 1's, every 2 is next to 2 3's, every 3 is next to 3 0's, every 4 is next to 4 2's

Diagonal of A197069

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A136300 A196689 A196725 * A144997 A088756 A319186

Adjacent sequences:  A197060 A197061 A197062 * A197064 A197065 A197066

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 09 2011

STATUS

approved

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Last modified June 18 23:16 EDT 2021. Contains 345125 sequences. (Running on oeis4.)