A146595 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 23, 33, 695, 1485, 24279, 63655, 1783137, 5665457, 342196123, 1330513267, 188030422867, 910767193965, 217509517678273, 1297575220619287, 530786226133942299, 3886182318855666813

Offset

1,7

Links

Table of n, a(n) for n=1..22.

Example

Maximal 8 X 8 example
.1.1.1.0.0.1.1.1
.1.0.0.0.0.0.0.1
.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
.0.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.1

Crossrefs

Sequence in context: A043129 A043909 A145566 * A230123 A049851 A353087

Adjacent sequences: A146592 A146593 A146594 * A146596 A146597 A146598

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved