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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2011
STATUS
approved

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Last modified July 12 06:23 EDT 2024. Contains 374237 sequences. (Running on oeis4.)