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A193611
Number of n X n symmetric 0..4 arrays with no element equal to the sum mod 5 of all its horizontal and vertical neighbors
0
4, 64, 4096, 1048580, 1073745920, 4398046511104, 72057594037927936
OFFSET
1,1
EXAMPLE
Some solutions for 4X4
..1..0..4..3....1..0..3..3....1..0..2..2....0..1..4..4....0..1..3..4
..0..2..0..3....0..2..3..3....0..4..3..1....1..1..1..1....1..0..1..0
..4..0..0..4....3..3..1..4....2..3..3..3....4..1..4..3....3..1..1..4
..3..3..4..0....3..3..4..1....2..1..3..2....4..1..3..4....4..0..4..4
CROSSREFS
Sequence in context: A053718 A053773 A053763 * A193755 A194501 A348315
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 31 2011
STATUS
approved