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A193486 Number of n X n symmetric 0..7 arrays with each element equal to the product mod 8 of two of its horizontal and vertical neighbors 0
0, 2, 22, 1250, 168193, 125116658, 311793921998 (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

..0..0..4..4....4..6..1..1....1..7..5..3....1..7..7..4....0..0..2..2

..0..0..1..7....6..6..1..1....7..3..5..7....7..7..1..4....0..1..1..5

..4..1..7..7....1..1..3..3....5..5..3..7....7..1..1..1....2..1..5..5

..4..7..7..1....1..1..3..1....3..7..7..1....4..4..1..1....2..5..5..1

CROSSREFS

Sequence in context: A152558 A202947 A177410 * A337577 A054948 A330124

Adjacent sequences:  A193483 A193484 A193485 * A193487 A193488 A193489

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 27 2011

STATUS

approved

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Last modified April 11 12:00 EDT 2021. Contains 342886 sequences. (Running on oeis4.)