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A146847 Number of n X n binary arrays with all ones connected only in a 1100-1111-0001 pattern in any orientation. 0
1, 1, 1, 17, 53, 349, 3775, 72823, 2211763, 82363675, 4738620129, 444556126937, 63087971915051 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.1.1.0.0

.0.0.0.0.1.1.1.1

.0.0.0.0.0.0.0.1

.0.0.0.0.0.1.1.0

.1.1.0.1.1.0.1.0

.0.1.0.1.1.0.1.1

.0.1.1.0.1.0.1.1

.0.1.1.0.1.1.0.0

CROSSREFS

Sequence in context: A147178 A146642 A146610 * A146714 A146397 A146405

Adjacent sequences:  A146844 A146845 A146846 * A146848 A146849 A146850

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified December 1 16:44 EST 2021. Contains 349430 sequences. (Running on oeis4.)