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A232942 Number of n X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally, vertically or antidiagonally, and top left element zero 1
1, 17, 1163, 328989, 389997789, 1950478851269, 41313911641960579, 3714942841397823613817, 1420295754221243029275852053, 2311198726771295243900465723816785 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A232948
LINKS
EXAMPLE
Some solutions for n=3
..0..1..1....0..2..2....0..2..2....0..1..1....0..1..1....0..1..1....0..0..1
..0..1..0....2..2..0....2..2..2....0..1..1....0..0..0....1..1..3....0..1..3
..1..1..0....2..0..1....3..3..3....0..1..1....0..2..2....1..3..3....0..1..3
CROSSREFS
Sequence in context: A130449 A130035 A032629 * A075602 A222985 A229833
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 02 2013
STATUS
approved

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Last modified April 14 00:20 EDT 2024. Contains 371652 sequences. (Running on oeis4.)