A146611 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-0110 pattern in any orientation.

1, 1, 1, 1, 1, 1, 17, 21, 613, 1249, 13923, 35499, 878873, 2681595, 245690631, 956048155, 150392601813, 733916941629, 176326135762271, 1064337095651755, 484338166495978939, 3619821636712367449

Offset

1,7

Links

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

Example

Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
.1.1.0.0.0.0.1.1

Crossrefs

Sequence in context: A146643 A146715 A146848 * A146398 A146406 A066470

Adjacent sequences: A146608 A146609 A146610 * A146612 A146613 A146614

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved