A146445 Number of n X n binary arrays with all ones connected only in a 1100-0110-0011 pattern in any orientation.

1, 1, 1, 9, 33, 185, 1861, 35285, 845657, 28275879, 1543673839, 135800422841, 17596518150277

Offset

1,4

Links

Table of n, a(n) for n=1..13.

Example

Maximal 8 X 8 example
.0.0.1.0.0.1.1.0
.0.1.1.0.1.1.0.1
.1.1.0.1.1.0.1.1
.1.0.1.0.0.1.1.0
.0.1.1.0.0.1.0.0
.1.1.0.1.1.0.1.1
.1.0.1.1.0.1.1.0
.0.1.1.0.1.1.0.0

Crossrefs

Sequence in context: A264258 A147444 A189179 * A046997 A013488 A186762

Adjacent sequences: A146442 A146443 A146444 * A146446 A146447 A146448

Keyword

nonn

Author

R. H. Hardin

Status

approved