A147247 Number of n X n binary arrays with all ones connected only in a 11100-00100-00111 pattern in any orientation.

1, 1, 1, 1, 13, 41, 245, 1633, 20989, 305457, 6244799, 168722653, 6674190341

Offset

1,5

Links

Table of n, a(n) for n=1..13.

Example

Maximal 8 X 8 example
.0.0.0.1.1.1.0.0
.0.0.0.0.0.1.0.0
.1.0.0.0.0.1.1.1
.1.0.0.0.0.0.0.0
.1.1.1.0.0.0.0.0
.0.0.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
.0.0.0.1.1.1.0.0

Crossrefs

Sequence in context: A355965 A231885 A167240 * A028468 A146995 A102130

Adjacent sequences: A147244 A147245 A147246 * A147248 A147249 A147250

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved