A146469 - OEIS

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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

(list; graph; refs; listen; history; text; internal format)

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