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A146796 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0110-0100-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 41, 41, 145, 145, 657, 657 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,13
LINKS
EXAMPLE
Maximal 13 X 13 example
.0.0.0.0.0.1.0.1.0.0.0.0.0
.0.0.0.1.1.1.0.1.1.1.0.0.0
.0.0.0.1.0.1.0.1.0.1.0.0.0
.0.1.1.0.0.1.0.1.0.0.1.1.0
.0.1.0.0.0.0.0.0.0.0.0.1.0
.1.1.1.1.0.0.0.0.0.1.1.1.1
.0.0.0.0.0.0.0.0.0.0.0.0.0
.1.1.1.1.0.0.0.0.0.1.1.1.1
.0.1.0.0.0.0.0.0.0.0.0.1.0
.0.1.1.0.0.1.0.1.0.0.1.1.0
.0.0.0.1.0.1.0.1.0.1.0.0.0
.0.0.0.1.1.1.0.1.1.1.0.0.0
.0.0.0.0.0.1.0.1.0.0.0.0.0
CROSSREFS
Sequence in context: A147469 A146274 A147037 * A146836 A146780 A146860
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified February 28 00:18 EST 2024. Contains 370379 sequences. (Running on oeis4.)