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A146395
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1100-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 5, 19, 43, 103, 349, 1189, 4335, 18031, 97075, 543815, 3556863, 24384071, 196142765, 1671349393
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.1.1.0.0.0
.0.0.0.0.1.1.0.0
.0.1.1.1.0.1.0.0
.1.1.0.0.0.1.0.1
.1.0.1.0.0.0.1.1
.0.0.1.0.1.1.1.0
.0.0.1.1.0.0.0.0
.0.0.0.1.1.0.0.0
CROSSREFS
Sequence in context: A020580 A172043 A146616 * A154302 A146736 A176358
KEYWORD
nonn
AUTHOR
STATUS
approved