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A147378 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 29, 29, 109, 109, 573, 573, 4463, 4463, 53751, 53751, 903115, 903115, 18601177 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,11
LINKS
EXAMPLE
Maximal 11 X 11 example
.0.0.0.1.1.0.1.1.0.0.0
.0.0.0.1.0.0.0.1.0.0.0
.0.0.1.1.0.0.0.1.1.0.0
.0.0.1.0.0.0.0.0.1.0.0
.0.1.1.0.0.0.0.0.1.1.0
.0.0.0.0.0.0.0.0.0.0.0
.0.1.1.0.0.0.0.0.1.1.0
.0.0.1.0.0.0.0.0.1.0.0
.0.0.1.1.0.0.0.1.1.0.0
.0.0.0.1.0.0.0.1.0.0.0
.0.0.0.1.1.0.1.1.0.0.0
CROSSREFS
Sequence in context: A111005 A076089 A046000 * A146604 A294691 A356839
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)