A147082 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 10000-11111-10000 pattern in any orientation.

1, 1, 1, 1, 1, 9, 17, 37, 127, 477, 2126, 12479, 73108, 516995, 4269319, 43333873, 484061833

Offset

1,6

Links

Table of n, a(n) for n=1..17.

Example

Maximal 8 X 8 example
.0.1.0.1.0.0.0.0
.0.1.0.1.1.1.1.1
.0.1.0.1.0.0.0.0
.0.1.0.0.0.1.1.1
.1.1.1.0.0.0.1.0
.0.0.0.0.1.0.1.0
.1.1.1.1.1.0.1.0
.0.0.0.0.1.0.1.0

Crossrefs

Sequence in context: A097478 A147026 A055393 * A145941 A245542 A186298

Adjacent sequences: A147079 A147080 A147081 * A147083 A147084 A147085

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved