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A146171 Number of n X n binary arrays with all ones connected only in a 110-100-111 pattern in any orientation. 0
1, 1, 9, 33, 89, 853, 34557, 906369, 18920177, 1254520087, 193995577775, 29705523106027, 5297235657600881 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.0.0.0.0

.1.0.0.0.0.0.1.1

.1.1.0.0.0.0.0.1

.0.0.0.0.0.1.1.1

.0.0.1.1.1.0.0.0

.1.1.0.0.1.0.1.1

.1.0.0.1.1.0.0.1

.1.1.1.0.0.1.1.1

CROSSREFS

Sequence in context: A146256 A005920 A020324 * A146188 A020228 A005939

Adjacent sequences:  A146168 A146169 A146170 * A146172 A146173 A146174

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 27 2008

STATUS

approved

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Last modified January 21 02:58 EST 2019. Contains 319344 sequences. (Running on oeis4.)