A146390 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1100-0111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 23, 37, 875, 1963, 36757, 101419, 3822491, 13049405, 1249688673, 5392077739, 1212521843981, 6669127121253, 2534961643458601, 17521933465479479, 12481578238641974653

Offset

1,7

Links

Table of n, a(n) for n=1..21.

Example

Maximal 8 X 8 example
.0.1.1.0.0.1.1.0
.1.1.0.0.0.0.1.1
.1.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.1
.0.0.1.0.0.1.0.0
.0.0.1.0.0.1.0.0
.0.1.1.0.0.1.1.0
.1.1.0.0.0.0.1.1

Crossrefs

Sequence in context: A090312 A089782 A113893 * A233385 A282712 A134754

Adjacent sequences: A146387 A146388 A146389 * A146391 A146392 A146393

Keyword

nonn

Author

R. H. Hardin

Status

approved