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A147261 Number of n X n binary arrays with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation. 0
1, 1, 1, 9, 33, 105, 825, 13503, 390699, 9339771, 391769047, 28305812373, 3390227207577 (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

.0.0.1.1.0.1.0.0

.0.0.1.0.1.1.1.0

.1.1.1.0.0.0.1.0

.0.1.0.0.0.0.1.1

.1.0.0.0.0.1.0.0

.1.1.1.0.1.1.0.0

.0.0.1.1.0.1.1.1

.0.0.1.0.0.0.0.1

CROSSREFS

Sequence in context: A147123 A147107 A147115 * A197359 A147155 A146232

Adjacent sequences:  A147258 A147259 A147260 * A147262 A147263 A147264

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified May 26 02:08 EDT 2022. Contains 354074 sequences. (Running on oeis4.)