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A147260 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0001-1101-0111 pattern in any orientation. 0
1, 1, 1, 1, 5, 17, 49, 213, 1189, 5181, 36191, 306061, 3589171 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.1.1.1.0.0.0.0
.1.1.0.1.0.0.0.0
.0.0.0.1.0.0.0.1
.1.1.1.0.1.1.0.1
.1.0.1.1.0.1.1.1
.1.0.0.0.1.0.0.0
.0.0.0.0.1.0.1.1
.0.0.0.0.1.1.1.0
CROSSREFS
Sequence in context: A176953 A082753 A000337 * A273688 A146045 A086866
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified April 13 06:32 EDT 2024. Contains 371638 sequences. (Running on oeis4.)