A146578 - OEIS

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A146578

Number of n X n binary arrays with all ones connected only in a 0100-1100-0111 pattern in any orientation.

1, 1, 1, 17, 57, 457, 7575, 206575, 7284891, 429058537, 43146239725, 6893658124929, 1724211995309777

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

OFFSET

1,4

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.1.0.1.1.1.0.0

.1.1.1.0.0.1.1.0

.1.0.0.0.0.1.0.0

.1.0.0.0.0.0.1.0

.0.1.0.0.0.1.1.1

.1.1.1.0.1.0.0.1

.1.0.0.0.1.1.0.1

.1.0.1.1.1.0.0.0

CROSSREFS

Sequence in context: A147209 A147239 A264473 * A146453 A146046 A048508

Adjacent sequences: A146575 A146576 A146577 * A146579 A146580 A146581

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved