A147467 - OEIS

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A147467

Number of n X n binary arrays with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.

1, 1, 1, 5, 17, 39, 155, 1391, 19355, 265987, 4290113, 107056079, 4105155205, 210787717557, 13820630859039

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

OFFSET

1,4

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.1.0.0.1.0

.1.1.1.1.0.0.1.0

.0.0.1.0.1.1.1.1

.0.0.1.0.0.0.1.1

.1.1.0.0.0.1.0.0

.1.1.1.1.0.1.0.0

.0.1.0.0.1.1.1.1

.0.1.0.0.1.1.0.0

CROSSREFS

Sequence in context: A147257 A146645 A146717 * A146272 A147035 A146134

Adjacent sequences: A147464 A147465 A147466 * A147468 A147469 A147470

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved