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A146626 Number of n X n binary arrays with all ones connected only in a 1010-1111-0010 pattern in any orientation. 0
1, 1, 1, 17, 49, 309, 4157, 84741, 2465029, 97708135, 6526384547, 698696833863, 110280303761989 (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

.0.1.0.0.0.0.1.0

.1.1.1.0.0.1.1.1

.0.1.0.0.0.0.1.0

.1.1.0.0.0.0.1.1

.0.0.0.0.0.1.0.0

.0.1.0.0.1.1.1.0

.1.1.1.1.0.1.0.0

.0.1.0.1.0.1.1.0

CROSSREFS

Sequence in context: A146730 A146862 A146586 * A146634 A146831 A146698

Adjacent sequences:  A146623 A146624 A146625 * A146627 A146628 A146629

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified October 25 17:22 EDT 2021. Contains 348255 sequences. (Running on oeis4.)