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A196925 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 1,4,3,2,0 for x=0,1,2,3,4 0
1, 1, 2, 7, 65, 1242, 55546, 5603265, 1280956817, 661075536443, 771059112373171, 2031433178217758354 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

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

Diagonal of A196929

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

..0..4..0..0....0..4..0..0....0..0..4..0....0..0..0..0....0..0..0..0

..0..0..0..0....0..0..4..0....0..0..0..0....0..0..4..0....0..0..0..0

..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0

CROSSREFS

Sequence in context: A179043 A116985 A042051 * A246865 A133237 A099660

Adjacent sequences:  A196922 A196923 A196924 * A196926 A196927 A196928

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 07 2011

STATUS

approved

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Last modified August 5 21:02 EDT 2021. Contains 346488 sequences. (Running on oeis4.)