A146429 - OEIS

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A146429

Number of n X n binary arrays with all ones connected only in a 101-111-101 pattern in any orientation.

1, 1, 3, 9, 19, 53, 531, 5709, 48307, 490649, 11283333, 359196547, 11541091447, 440660012263, 27722494439108, 2548067434592087, 280390489794224900

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

OFFSET

1,3

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.0.1.0.1

.0.1.0.0.0.1.1.1

.1.1.1.0.0.1.0.1

.0.0.0.0.0.0.0.0

.0.1.0.1.0.1.0.1

.0.1.1.1.0.1.1.1

.0.1.0.1.0.1.0.1

CROSSREFS

Sequence in context: A146677 A077442 A147455 * A297390 A018316 A146605

Adjacent sequences: A146426 A146427 A146428 * A146430 A146431 A146432

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved