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A146466 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-0111-0100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 7, 7, 21, 21, 55, 55, 263, 263, 1645, 1645, 13423, 13423 (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
.0.0.0.1.1.1.0.1.1.1.0.0.0
.1.0.0.1.0.0.0.0.0.1.0.0.1
.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
.1.0.0.1.0.0.0.0.0.1.0.0.1
.0.0.0.1.1.1.0.1.1.1.0.0.0
.0.0.1.1.0.0.0.0.0.1.1.0.0
CROSSREFS
Sequence in context: A146711 A146402 A146410 * A146141 A062368 A283067
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)