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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified February 27 06:28 EST 2024. Contains 370362 sequences. (Running on oeis4.)