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A147454 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 30, 13, 224, 49, 2000, 233, 18098, 1439, 209069, 14021, 3920160, 187331, 110361488, 3462054 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,11
LINKS
EXAMPLE
Maximal 11 X 11 example
.0.0.1.0.1.0.1.0.1.0.0
.0.0.1.0.1.1.1.0.1.0.0
.0.0.1.0.0.1.0.0.1.0.0
.0.1.1.1.0.1.0.1.1.1.0
.0.1.0.1.0.1.0.1.0.1.0
.0.0.0.0.0.0.0.0.0.0.0
.0.1.0.1.0.1.0.1.0.1.0
.0.1.1.1.0.1.0.1.1.1.0
.0.0.1.0.0.1.0.0.1.0.0
.0.0.1.0.1.1.1.0.1.0.0
.0.0.1.0.1.0.1.0.1.0.0
CROSSREFS
Sequence in context: A131773 A091746 A040874 * A147077 A263927 A033350
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)