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A146996 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-11111 pattern in any orientation. 0
1, 1, 1, 1, 7, 1, 28, 9, 229, 55, 5513, 1233, 246733, 35489, 18835539, 2205048, 2577591714, 236261747, 672360073942, 49798609885, 337403612881491, 18952604466995, 317710878094077132, 13788718527302227 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..24.

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

.0.0.1.0.0.1.0.0

.0.0.1.0.0.1.0.0

.1.1.1.0.0.1.1.1

.0.0.1.0.0.1.0.0

.0.0.1.0.0.1.0.0

CROSSREFS

Sequence in context: A053288 A282917 A050301 * A286895 A083994 A301731

Adjacent sequences:  A146993 A146994 A146995 * A146997 A146998 A146999

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified January 28 00:29 EST 2022. Contains 350654 sequences. (Running on oeis4.)