A147088 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 10001-11111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 5, 1, 7, 1, 22, 5, 57, 13, 165, 33, 836, 133, 3941, 443, 19907, 1649, 132005

Offset

1,9

Links

Table of n, a(n) for n=1..27.

Example

Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.0.1.1.1.1.1.0.0
.1.1.0.0.0.0.0.1.1
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.1.1.0.0.0.0.0.1.1
.0.0.1.1.1.1.1.0.0
.0.0.1.0.0.0.1.0.0

Crossrefs

Sequence in context: A328478 A093411 A377619 * A346468 A340083 A339667

Adjacent sequences: A147085 A147086 A147087 * A147089 A147090 A147091

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved