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A147203 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-0101-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 49, 49, 205, 205, 2349, 2349, 61265, 61265, 1411269, 1411269, 32593981, 32593981 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

Maximal 9 X 9 example

.0.0.1.1.0.1.1.0.0

.0.0.0.1.0.1.0.0.0

.0.1.1.1.0.1.1.1.0

.0.1.0.0.0.0.0.1.0

.0.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.0.1.0

.0.1.1.1.0.1.1.1.0

.0.0.0.1.0.1.0.0.0

.0.0.1.1.0.1.1.0.0

CROSSREFS

Sequence in context: A146873 A146793 A146801 * A146777 A147053 A146857

Adjacent sequences: A147200 A147201 A147202 * A147204 A147205 A147206

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified February 2 21:10 EST 2023. Contains 360024 sequences. (Running on oeis4.)