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A146127 Number of n X n binary arrays with all ones connected only in a 3X2 zee 1,1 1,2 1,3 2,3 2,4 in any orientation. 0
1, 1, 1, 29, 249, 3031, 82773, 3652185, 277821789, 35279858253, 7589314375275, 2802616385484099 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.1.1.1.0

.0.0.1.1.0.0.1.1

.0.1.0.0.1.1.0.0

.1.1.0.0.0.1.1.1

.1.0.1.1.1.0.0.0

.1.0.0.0.1.1.0.0

.0.1.1.1.0.0.1.1

.1.1.0.0.1.1.1.0

CROSSREFS

Sequence in context: A126524 A334690 A027939 * A146038 A142683 A042634

Adjacent sequences:  A146124 A146125 A146126 * A146128 A146129 A146130

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 27 2008

STATUS

approved

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Last modified December 2 10:34 EST 2021. Contains 349437 sequences. (Running on oeis4.)