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A147491 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11101-10111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 25, 25, 137, 137, 521, 521, 6501, 6501, 70441, 70441, 694381, 694381, 20946853, 20946853, 656540805 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,11
LINKS
EXAMPLE
Maximal 11 X 11 example
.1.1.0.1.1.0.1.1.0.1.1
.0.1.0.1.0.0.0.1.0.1.0
.1.1.0.1.1.0.1.1.0.1.1
.1.0.0.0.1.0.1.0.0.0.1
.1.1.0.1.1.0.1.1.0.1.1
.0.0.0.0.0.0.0.0.0.0.0
.1.1.0.1.1.0.1.1.0.1.1
.1.0.0.0.1.0.1.0.0.0.1
.1.1.0.1.1.0.1.1.0.1.1
.0.1.0.1.0.0.0.1.0.1.0
.1.1.0.1.1.0.1.1.0.1.1
CROSSREFS
Sequence in context: A323522 A040601 A022359 * A147507 A146865 A146740
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified September 14 18:34 EDT 2024. Contains 375929 sequences. (Running on oeis4.)