A147332 - OEIS

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A147332

Number of n X n binary arrays with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation.

1, 1, 1, 1, 9, 25, 93, 581, 5781, 81207, 1381089, 32305189, 1078010229, 50872472923, 3293688883749

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

OFFSET

1,5

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.1.0.0.0

.0.0.0.1.1.1.0.0

.0.0.0.0.0.1.1.1

.0.0.0.0.1.0.1.0

.0.1.0.1.1.1.0.0

.1.1.1.0.0.1.1.1

.0.0.1.1.1.0.1.0

.0.0.0.1.0.0.0.0

CROSSREFS

Sequence in context: A189118 A075067 A075064 * A147460 A147475 A146674

Adjacent sequences: A147329 A147330 A147331 * A147333 A147334 A147335

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved