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A146674 Number of n X n binary arrays with all ones connected only in a 1100-0111-1100 pattern in any orientation. 0
1, 1, 1, 9, 25, 93, 633, 8913, 136370, 2447483, 66801664, 2869431585, 170625522480, 13470400903777 (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

.1.1.0.0.0.1.0.1

.0.1.1.1.0.1.1.1

.1.1.0.0.0.0.1.0

.0.0.0.0.0.0.1.0

.0.0.0.0.0.0.0.0

.1.1.0.0.1.1.0.0

.0.1.1.1.0.1.1.1

.1.1.0.0.1.1.0.0

CROSSREFS

Sequence in context: A147332 A147460 A147475 * A083672 A193644 A083100

Adjacent sequences:  A146671 A146672 A146673 * A146675 A146676 A146677

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified December 2 04:43 EST 2021. Contains 349437 sequences. (Running on oeis4.)