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A146711 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-1111-0100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 7, 7, 21, 21, 51, 51, 237, 237, 1129, 1129, 8811 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,13
LINKS
EXAMPLE
Maximal 13 X 13 example
.0.0.1.1.0.0.0.0.0.1.1.0.0
.0.0.1.1.1.1.0.1.1.1.1.0.0
.1.1.0.1.0.0.0.0.0.1.0.1.1
.1.1.1.0.0.0.0.0.0.0.1.1.1
.0.1.0.0.0.0.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.0.0.0.0.1.0
.1.1.1.0.0.0.0.0.0.0.1.1.1
.1.1.0.1.0.0.0.0.0.1.0.1.1
.0.0.1.1.1.1.0.1.1.1.1.0.0
.0.0.1.1.0.0.0.0.0.1.1.0.0
CROSSREFS
Sequence in context: A146703 A146615 A146735 * A146402 A146410 A146466
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
EXTENSIONS
Example repaired. - R. H. Hardin, Nov 05 2008
STATUS
approved

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Last modified August 12 19:26 EDT 2024. Contains 375113 sequences. (Running on oeis4.)