A147467 Number of n X n binary arrays with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.

1, 1, 1, 5, 17, 39, 155, 1391, 19355, 265987, 4290113, 107056079, 4105155205, 210787717557, 13820630859039

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.0.0.1.1.0.0.1.0
.1.1.1.1.0.0.1.0
.0.0.1.0.1.1.1.1
.0.0.1.0.0.0.1.1
.1.1.0.0.0.1.0.0
.1.1.1.1.0.1.0.0
.0.1.0.0.1.1.1.1
.0.1.0.0.1.1.0.0

Crossrefs

Sequence in context: A147257 A146645 A146717 * A146272 A147035 A146134

Adjacent sequences: A147464 A147465 A147466 * A147468 A147469 A147470

Keyword

nonn

Author

R. H. Hardin

Status

approved