A147075 Number of n X n binary arrays with all ones connected only in a 10000-11111-10000 pattern in any orientation.

1, 1, 1, 1, 13, 65, 313, 2325, 24995, 319309, 7251986, 214577039, 8040409512

Offset

1,5

Links

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

Example

Maximal 8 X 8 example
.1.0.0.0.0.1.1.1
.1.1.1.1.1.0.1.0
.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.0.1
.0.1.0.1.1.1.1.1
.1.1.1.0.0.0.0.1

Crossrefs

Sequence in context: A153793 A067160 A147067 * A268777 A109727 A041320

Adjacent sequences: A147072 A147073 A147074 * A147076 A147077 A147078

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved