A146586 - OEIS

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A146586

Number of n X n binary arrays with all ones connected only in a 0110-1111-0100 pattern in any orientation.

1, 1, 1, 17, 49, 301, 4891, 104131, 3555075, 179509487, 14641599949, 2046712162355, 431012136746009, 147708888913757129

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

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Maximal 8 X 8 example

.0.1.0.0.0.0.1.0

.1.1.1.0.0.1.1.1

.1.1.0.0.0.0.1.1

.0.1.0.0.0.0.1.0

.0.0.1.0.0.0.0.0

.0.1.1.1.0.0.1.0

.0.1.1.0.1.1.1.1

.0.0.1.0.0.1.1.0

CROSSREFS

Sequence in context: A146666 A146730 A146862 * A146626 A146634 A146831

Adjacent sequences: A146583 A146584 A146585 * A146587 A146588 A146589

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved