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A146831 Number of n X n binary arrays with all ones connected only in a 1001-1111-0100 pattern in any orientation. 0
1, 1, 1, 17, 49, 317, 3643, 63437, 1864637, 68228177, 3719926503, 324717444923, 42997787423811 (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

.1.0.0.1.0.0.0.0

.1.1.1.1.0.1.1.0

.0.1.0.0.0.0.1.0

.0.0.0.0.0.0.1.1

.1.1.0.0.0.1.1.0

.0.1.1.0.1.0.0.0

.0.1.0.1.1.1.1.0

.1.1.0.1.0.0.1.0

CROSSREFS

Sequence in context: A146586 A146626 A146634 * A146698 A146706 A120612

Adjacent sequences:  A146828 A146829 A146830 * A146832 A146833 A146834

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified September 24 14:16 EDT 2021. Contains 347643 sequences. (Running on oeis4.)