A147376 Number of n X n binary arrays with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation.

1, 1, 1, 1, 9, 29, 109, 573, 4463, 53751, 903115, 18601177, 480082809, 16926813155

Offset

1,5

Links

Table of n, a(n) for n=1..14.

Example

Maximal 8 X 8 example
.0.0.1.1.0.0.0.0
.0.0.1.0.1.1.0.0
.0.1.1.0.0.1.0.0
.0.1.0.0.0.1.1.0
.1.1.0.0.1.0.1.0
.0.0.1.1.1.0.1.1
.1.1.1.0.0.0.0.0
.1.0.0.0.0.0.0.0

Crossrefs

Sequence in context: A035075 A103535 A147268 * A201447 A288744 A183245

Adjacent sequences: A147373 A147374 A147375 * A147377 A147378 A147379

Keyword

nonn

Author

R. H. Hardin

Status

approved