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A193485 Number of n X n symmetric 0..6 arrays with each element equal to the product mod 7 of two of its horizontal and vertical neighbors 0
0, 4, 46, 2731, 700180, 861416011, 4011951942490 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
EXAMPLE
Some solutions for 4X4
..1..6..6..1....0..0..3..4....1..1..1..6....0..0..0..0....4..2..4..2
..6..1..1..6....0..0..6..6....1..6..6..6....0..0..1..1....2..2..4..4
..6..1..6..6....3..6..1..1....1..6..1..1....0..1..1..1....4..4..2..1
..1..6..6..1....4..6..1..1....6..6..1..1....0..1..1..1....2..4..1..1
CROSSREFS
Sequence in context: A269005 A107766 A065777 * A006422 A301278 A186677
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 27 2011
STATUS
approved

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Last modified April 20 22:14 EDT 2024. Contains 371848 sequences. (Running on oeis4.)