login
A146933
Number of n X n binary arrays with all ones connected only in a 1111-1111 pattern in any orientation.
0
1, 1, 1, 7, 25, 89, 559, 4332, 47525, 720844, 13515353, 345530332, 11945906159, 546900316419, 33704239869671, 2765958377374818
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.1.1.1.1.0.0.0.0
.1.1.1.1.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.1.1.0.1.1.0.1.1
.1.1.0.1.1.0.1.1
.1.1.0.1.1.0.1.1
.1.1.0.1.1.0.1.1
CROSSREFS
Sequence in context: A183914 A279216 A245769 * A155258 A261722 A256370
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved