A147428 - OEIS

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A147428

Number of n X n binary arrays with all ones connected only in a 1010-1111-0101 pattern in any orientation.

1, 1, 1, 9, 25, 89, 469, 5217, 82459, 1354121, 28702995, 915889909, 44493843165, 2922255231469

(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

.0.1.0.1.0.0.1.1

.1.1.1.1.0.1.1.0

.1.0.1.0.0.0.1.1

.0.0.0.0.0.1.1.0

.1.1.0.0.0.0.0.0

.0.1.1.0.0.1.0.1

.1.1.0.0.1.1.1.1

.0.1.1.0.1.0.1.0

CROSSREFS

Sequence in context: A147413 A066137 A269662 * A147436 A189118 A075067

Adjacent sequences: A147425 A147426 A147427 * A147429 A147430 A147431

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved