A147002 - OEIS

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A147002

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 00100-00100-11111 pattern in any orientation.

1, 1, 1, 1, 1, 5, 20, 47, 155, 569, 2601, 13423, 95231, 685877, 6411543, 61586198

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

OFFSET

1,6

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.0.1.1.1.1.1.0

.0.0.0.0.1.0.0.1

.1.0.0.0.1.0.0.1

.1.0.0.0.0.1.1.1

.1.1.1.0.0.0.0.1

.1.0.0.1.0.0.0.1

.1.0.0.1.0.0.0.0

.0.1.1.1.1.1.0.0

CROSSREFS

Sequence in context: A033429 A168011 A160749 * A005287 A147488 A297569

Adjacent sequences: A146999 A147000 A147001 * A147003 A147004 A147005

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved