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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..16.

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

Adjacent sequences: A146930 A146931 A146932 * A146934 A146935 A146936

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified November 27 22:56 EST 2022. Contains 358406 sequences. (Running on oeis4.)