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A183502 Number of n X n 0..3 arrays with no element equal to the sum mod 4 of its horizontal and vertical neighbors 0
3, 81, 19683, 43146816, 847298204784 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A183508

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for 3X3

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

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

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

CROSSREFS

Sequence in context: A223570 A228971 A060722 * A325053 A134799 A055590

Adjacent sequences:  A183499 A183500 A183501 * A183503 A183504 A183505

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 05 2011

STATUS

approved

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Last modified January 20 02:48 EST 2022. Contains 350467 sequences. (Running on oeis4.)