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A147510 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11110-01111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 9, 9, 23, 23, 81, 81, 267, 267, 1053, 1053, 6173, 6173 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,13
LINKS
EXAMPLE
Maximal 13 X 13 example
.0.0.0.0.1.0.0.0.1.0.0.0.0
.0.0.0.0.1.1.0.1.1.0.0.0.0
.0.0.0.0.1.1.0.1.1.0.0.0.0
.0.0.0.0.1.1.0.1.1.0.0.0.0
.1.1.1.1.0.1.0.1.0.1.1.1.1
.0.1.1.1.1.0.0.0.1.1.1.1.0
.0.0.0.0.0.0.0.0.0.0.0.0.0
.0.1.1.1.1.0.0.0.1.1.1.1.0
.1.1.1.1.0.1.0.1.0.1.1.1.1
.0.0.0.0.1.1.0.1.1.0.0.0.0
.0.0.0.0.1.1.0.1.1.0.0.0.0
.0.0.0.0.1.1.0.1.1.0.0.0.0
.0.0.0.0.1.0.0.0.1.0.0.0.0
CROSSREFS
Sequence in context: A146820 A146663 A146394 * A146474 A145957 A214439
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 19 03:57 EDT 2024. Contains 371782 sequences. (Running on oeis4.)