A147338 Number of n X n binary arrays with all ones connected only in a 0100-0100-1111-0010-0010 pattern in any orientation.

1, 1, 1, 1, 9, 25, 57, 341, 3079, 34841, 488119, 8511553, 213350177, 7487333931, 351333499149

Offset

1,5

Links

Table of n, a(n) for n=1..15.

Example

Maximal 8 X 8 example
.0.0.1.0.0.0.0.0
.0.0.1.1.1.0.0.0
.1.1.1.0.0.0.0.0
.0.0.1.0.0.0.1.0
.0.0.0.0.0.0.1.0
.0.0.0.0.1.1.1.1
.0.0.0.0.0.1.0.0
.0.0.0.0.0.1.0.0

Crossrefs

Sequence in context: A099971 A124702 A113829 * A147325 A147368 A147497

Adjacent sequences: A147335 A147336 A147337 * A147339 A147340 A147341

Keyword

nonn

Author

R. H. Hardin

Status

approved