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URL: https://oeis.org/A146373

⇱ A146373 - OEIS

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A146373
Number of n X n binary arrays with all ones connected only in a 0100-1111-0100 pattern in any orientation.
0
1, 1, 1, 9, 25, 125, 1331, 18779, 389231, 11969301, 573650431, 41782304071, 4475707668912, 731606853804073, 181071469572900858
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.0.0.0.0
.1.1.1.1.0.0.0.0
.0.1.0.0.0.0.1.0
.0.0.0.0.0.1.1.1
.0.1.0.0.1.0.1.0
.1.1.1.0.1.0.1.0
.0.1.0.1.1.1.0.0
.0.1.0.0.1.0.0.0
CROSSREFS
Sequence in context: A227078 A380405 A146365 * A084605 A098773 A089998
KEYWORD
nonn
AUTHOR
STATUS
approved