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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

Table of n, a(n) for n=1..24.

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: A243996 A125968 A335987 * A147012 A032394 A242988

Adjacent sequences:  A147065 A147066 A147067 * A147069 A147070 A147071

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified May 28 18:24 EDT 2022. Contains 354122 sequences. (Running on oeis4.)