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A146063 Number of n X n binary arrays with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation. 0
1, 1, 5, 17, 53, 497, 10289, 196357, 5677027, 310742317, 27512226687, 3369038880519, 646981592661815, 203366474520147193 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.0.0.0.1.0

.1.1.1.0.1.1.1.0

.1.0.0.0.1.0.0.1

.0.0.0.0.0.1.1.1

.0.1.1.0.0.1.0.0

.0.1.0.1.1.0.0.1

.1.1.0.1.0.1.1.1

.0.0.1.1.0.1.0.0

CROSSREFS

Sequence in context: A242429 A097160 A149656 * A146006 A161470 A295163

Adjacent sequences: A146060 A146061 A146062 * A146064 A146065 A146066

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 26 2008

STATUS

approved

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Last modified January 30 22:27 EST 2023. Contains 359947 sequences. (Running on oeis4.)