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A146658 Number of n X n binary arrays with all ones connected only in a 1100-0111-0001 pattern in any orientation. 0
1, 1, 1, 17, 73, 521, 7411, 207693, 7583663, 399906057, 35432211775 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Maximal 8 X 8 example

.0.1.1.0.1.1.0.1

.0.1.0.0.1.0.1.1

.1.1.0.1.1.0.1.0

.1.0.0.1.0.1.1.0

.0.1.1.0.1.0.0.1

.0.1.0.1.1.0.1.1

.1.1.0.1.0.0.1.0

.1.0.1.1.0.1.1.0

CROSSREFS

Sequence in context: A096637 A201610 A201262 * A145440 A112013 A165691

Adjacent sequences:  A146655 A146656 A146657 * A146659 A146660 A146661

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)