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A193124 Number of n X n symmetric 0..7 arrays with each element equal to the sum mod 8 of two of its horizontal and vertical neighbors 0
0, 1, 41, 2849, 731987, 1412507142 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for 4X4

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

..6..2..4..4....4..6..2..4....4..4..2..6....3..6..2..1....4..4..6..7

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

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

CROSSREFS

Sequence in context: A223384 A211907 A291860 * A223004 A275093 A275349

Adjacent sequences:  A193121 A193122 A193123 * A193125 A193126 A193127

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 16 2011

STATUS

approved

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Last modified May 23 00:47 EDT 2022. Contains 353959 sequences. (Running on oeis4.)