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.

1, 1, 1, 1, 5, 1, 13, 5, 80, 15, 1622, 239, 39282, 4131, 1538621, 99155, 127226887, 5960881, 16725872953, 549694386, 3916428224133

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