A146188 - OEIS

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A146188

Number of n X n binary arrays with all ones connected only in a 101-111-100 pattern in any orientation.

1, 1, 9, 33, 89, 973, 38577, 1078541, 28644797, 2049754535, 324959092887, 58338532772401, 13434523893685925

(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

.1.0.1.0.1.0.1.0

.1.1.1.0.1.1.1.0

.1.0.0.0.1.0.0.1

.0.1.0.1.0.1.1.1

.0.1.1.1.0.1.0.1

.1.0.0.1.0.0.1.0

.1.1.1.0.1.1.1.0

.1.0.1.0.1.0.1.0

CROSSREFS

Sequence in context: A005920 A020324 A146171 * A020228 A005939 A020326

Adjacent sequences: A146185 A146186 A146187 * A146189 A146190 A146191

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 27 2008

STATUS

approved