A147089 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 10001-11111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 1, 7, 17, 27, 59, 159, 377, 1061, 3282, 11263

Offset

1,8

Links

Table of n, a(n) for n=1..16.

Example

Maximal 8 X 8 example
.0.0.0.0.0.1.1.0
.1.1.1.1.1.0.1.0
.1.0.0.0.1.0.1.0
.0.1.1.0.0.0.1.0
.0.1.0.0.0.1.1.0
.0.1.0.1.0.0.0.1
.0.1.0.1.1.1.1.1
.0.1.1.0.0.0.0.0

Crossrefs

Sequence in context: A277594 A160912 A017353 * A045575 A029532 A217926

Adjacent sequences: A147086 A147087 A147088 * A147090 A147091 A147092

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved