A147392 Number of n X n binary arrays with all ones connected only in a 1000-1000-1111-0001-0001 pattern in any orientation.

1, 1, 1, 1, 9, 25, 65, 305, 2297, 32289, 404565, 5435093, 101023199, 2823418681, 117113399963

Offset

1,5

Links

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

Example

Maximal 8 X 8 example
.0.0.1.1.1.0.0.0
.0.0.1.0.0.0.0.0
.0.0.1.0.0.0.0.0
.1.1.1.0.0.0.0.1
.0.0.0.0.0.0.0.1
.0.0.0.0.1.1.1.1
.0.0.0.0.1.0.0.0
.0.0.0.0.1.0.0.0

Crossrefs

Sequence in context: A077118 A242116 A209530 * A147318 A146589 A146866

Adjacent sequences: A147389 A147390 A147391 * A147393 A147394 A147395

Keyword

nonn

Author

R. H. Hardin

Status

approved