A146381 Number of n X n binary arrays with all ones connected only in a 0110-1111 pattern in any orientation.

1, 1, 1, 13, 69, 528, 7033, 141904, 4322355, 197401178, 13868215311, 1479290583806, 238998054376606

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.1.0.1.1.1.1.0.0
.1.1.0.1.1.0.0.0
.1.1.0.0.0.0.0.1
.1.0.0.1.0.0.1.1
.0.1.0.1.1.0.1.1
.1.1.0.1.1.0.0.1
.1.1.0.1.0.1.1.0
.0.1.0.0.1.1.1.1

Crossrefs

Sequence in context: A055880 A105058 A146469 * A085461 A081860 A050403

Adjacent sequences: A146378 A146379 A146380 * A146382 A146383 A146384

Keyword

nonn

Author

R. H. Hardin

Status

approved