A146469 Number of n X n binary arrays with all ones connected only in a 1110-0111 pattern in any orientation.

1, 1, 1, 13, 69, 457, 6223, 127787, 3658281, 163817453, 11238713859, 1160267254915, 182817418500667

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.0.0.0.0.0.0.0.0
.1.1.1.0.1.1.1.0
.0.1.1.1.0.1.1.1
.0.0.0.0.0.0.0.0
.1.1.1.0.1.1.1.0
.0.1.1.1.0.1.1.1

Crossrefs

Sequence in context: A055338 A055880 A105058 * A146381 A085461 A081860

Adjacent sequences: A146466 A146467 A146468 * A146470 A146471 A146472

Keyword

nonn

Author

R. H. Hardin

Status

approved