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A146616
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1111-0110 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 5, 19, 43, 79, 175, 645, 2171, 9657, 44753, 231501, 1238311, 7694793, 51485225, 407164775, 3411323191
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.1.0.0
.0.0.1.1.1.1.0.0
.1.1.0.1.1.0.1.0
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
.0.1.0.1.1.0.1.1
.0.0.1.1.1.1.0.0
.0.0.1.0.0.0.0.0
CROSSREFS
Sequence in context: A094465 A020580 A172043 * A146395 A154302 A146736
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved