A146792 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0110-0100-1111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 17, 29, 597, 1129, 8865, 24301, 252485, 677761, 72037073, 260058405, 50790437661, 228224469561, 29783355194457, 163753391774397, 29294065583268725, 187282551074891489

Offset

1,7

Links

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

Example

Maximal 8 X 8 example
.0.0.1.0.0.1.0.0
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
.1.0.0.0.0.0.0.1
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.1.0.0.0.0.0.0.1

Crossrefs

Sequence in context: A104067 A274023 A146872 * A124884 A052006 A002675

Adjacent sequences: A146789 A146790 A146791 * A146793 A146794 A146795

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved