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A146925 Number of n X n binary arrays with all ones connected only in a 1001-1111-1001 pattern in any orientation. 0
1, 1, 1, 5, 13, 37, 117, 629, 5685, 56354, 602084, 7772959, 142197171, 3619248864, 116780772318, 4548516587793, 219091485187390 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.1.0.0.1

.0.1.0.0.1.1.1.1

.0.1.0.0.1.0.0.1

.1.1.1.0.0.0.0.0

.0.0.0.0.0.1.1.1

.1.0.0.1.0.0.1.0

.1.1.1.1.0.0.1.0

.1.0.0.1.0.1.1.1

CROSSREFS

Sequence in context: A071100 A199108 A125734 * A146452 A146062 A201612

Adjacent sequences:  A146922 A146923 A146924 * A146926 A146927 A146928

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified June 5 18:48 EDT 2020. Contains 334854 sequences. (Running on oeis4.)