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A147163 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1101-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 17, 21, 565, 1121, 12671, 31849, 581567 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.1.1.0.0.1.1.0

.0.0.1.0.0.1.0.0

.0.1.1.0.0.1.1.0

.1.1.0.0.0.0.1.1

CROSSREFS

Sequence in context: A146840 A146587 A147256 * A147179 A146627 A146635

Adjacent sequences:  A147160 A147161 A147162 * A147164 A147165 A147166

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified October 18 06:50 EDT 2021. Contains 348066 sequences. (Running on oeis4.)