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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

Table of n, a(n) for n=1..7.

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

Adjacent sequences:  A193482 A193483 A193484 * A193486 A193487 A193488

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 27 2011

STATUS

approved

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Last modified June 27 04:37 EDT 2022. Contains 354888 sequences. (Running on oeis4.)