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A147068 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11111-00001 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 7, 9, 21, 27, 607, 1167, 17769, 40363, 559713, 1434237, 48361407, 146868985, 7834524479, 27923748641, 1943918391505, 8015840240133, 1237965320138777, 6025367765747539 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0
CROSSREFS
Sequence in context: A139202 A243996 A125968 * A147012 A032394 A242988
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified June 19 00:22 EDT 2024. Contains 373492 sequences. (Running on oeis4.)