A147131 - OEIS

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A147131

Number of n X n binary arrays with all ones connected only in a 1000-1001-1111 pattern in any orientation.

1, 1, 1, 17, 57, 277, 2295, 39117, 1059135, 28274373, 1087879177, 69075461955

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

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.1.0.0.0.0

.1.0.0.1.0.1.1.1

.1.0.0.0.0.0.0.1

.0.0.0.0.0.0.0.1

.1.1.0.0.0.0.1.1

.1.0.0.0.1.0.0.0

.1.0.0.0.1.0.0.1

.1.1.1.0.1.1.1.1

CROSSREFS

Sequence in context: A141841 A146682 A146650 * A147162 A146690 A146437

Adjacent sequences: A147128 A147129 A147130 * A147132 A147133 A147134

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved