A146642 - OEIS

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A146642

Number of n X n binary arrays with all ones connected only in a 1010-1111-1000 pattern in any orientation.

1, 1, 1, 17, 53, 329, 3935, 73477, 2119711, 76531381, 4373283473, 404095793939, 55306039341887

(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

.0.0.1.0.1.0.1.0

.0.1.1.1.1.0.1.1

.0.0.0.0.1.0.1.0

.0.0.0.0.0.1.1.1

.0.1.0.0.0.0.0.0

.1.1.0.0.0.0.0.1

.0.1.0.0.1.1.1.1

.1.1.1.0.0.1.0.1

CROSSREFS

Sequence in context: A146737 A146839 A147178 * A146610 A146847 A146714

Adjacent sequences: A146639 A146640 A146641 * A146643 A146644 A146645

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved