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A147004 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-11111-00100 pattern in any orientation. 0
1, 1, 1, 1, 5, 1, 13, 5, 80, 15, 1622, 239, 39282, 4131, 1538621, 99155, 127226887, 5960881, 16725872953, 549694386, 3916428224133 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..21.

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

.0.1.0.0.0.0.1.0

.0.1.0.0.0.0.1.0

.1.1.1.0.0.1.1.1

.0.1.0.0.0.0.1.0

.0.1.0.0.0.0.1.0

CROSSREFS

Sequence in context: A081224 A104793 A243883 * A319664 A205961 A146620

Adjacent sequences: A147001 A147002 A147003 * A147005 A147006 A147007

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified February 8 07:56 EST 2023. Contains 360136 sequences. (Running on oeis4.)