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A145943 Number of n X n binary arrays with all ones connected in a 3X2 elbow 1,1 1,2 1,3 2,3 in any orientation. 0
1, 1, 17, 101, 1439, 45325, 2541179, 249765423, 48546882545, 17503645590565, 11722960747922791 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.1.1.1.0

.0.0.1.0.1.0.0.1

.1.1.0.0.0.1.1.1

.1.0.1.1.1.0.0.0

.1.0.0.0.1.0.1.1

.0.1.1.1.0.1.0.1

.1.0.0.1.0.1.0.1

.1.1.1.0.0.1.1.0

CROSSREFS

Sequence in context: A186258 A175518 A215234 * A331950 A234693 A022677

Adjacent sequences:  A145940 A145941 A145942 * A145944 A145945 A145946

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 25 2008

STATUS

approved

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Last modified September 25 12:57 EDT 2021. Contains 347654 sequences. (Running on oeis4.)