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A147270 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1111-0001 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 183, 351, 3185, 7397, 80251, 204181, 3751343, 10958987, 859595115, 3088432553, 597934255811, 2680671785861 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.0.1.0.1.0.0.0
.1.1.1.1.0.1.1.1.1
.1.0.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.0.1
.0.0.0.0.0.0.0.0.0
.1.0.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.0.1
.1.1.1.1.0.1.1.1.1
.0.0.0.1.0.1.0.0.0
CROSSREFS
Sequence in context: A133609 A305349 A030465 * A147124 A261110 A260172
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified September 22 18:47 EDT 2023. Contains 365531 sequences. (Running on oeis4.)