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⇱ A146704 - OEIS

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A146704
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-1111-0010 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 3, 19, 43, 75, 183, 643, 2215, 9883, 45633, 225733, 1239851, 7715029, 52987121, 415234347, 3530586371, 34390495263
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.0.0.1.0
.1.1.0.0.1.1.1.1
.0.1.1.0.1.1.0.0
.0.1.1.0.0.0.0.0
.0.0.0.0.0.1.1.0
.0.0.1.1.0.1.1.0
.1.1.1.1.0.0.1.1
.0.1.0.0.0.0.1.0
CROSSREFS
Sequence in context: A341087 A031393 A146672 * A103145 A100694 A146664
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved