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A147123 Number of n X n binary arrays with all ones connected only in a 1000-1000-1111-1000 pattern in any orientation. 0
1, 1, 1, 9, 33, 105, 641, 8787, 211111, 4653287, 141740021, 6813049829, 531641820663 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
EXAMPLE
Maximal 8 X 8 example
.1.0.0.0.1.1.1.1
.1.1.1.1.0.0.1.0
.1.0.0.0.0.0.1.0
.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.1.0.0.1.1.1.1
.1.1.1.1.0.0.0.1
CROSSREFS
Sequence in context: A220165 A036543 A147269 * A147107 A147115 A147261
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified March 28 21:54 EDT 2024. Contains 371254 sequences. (Running on oeis4.)