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A146780 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0010-1010-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 17, 17, 43, 43, 145, 145, 633, 633 (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
.0.0.0.0.0.1.0.1.0.0.0.0.0
.0.1.0.0.1.1.0.1.1.0.0.1.0
.0.1.0.1.0.0.0.0.0.1.0.1.0
.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
.0.1.0.1.0.0.0.0.0.1.0.1.0
.0.1.0.0.1.1.0.1.1.0.0.1.0
.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
.0.0.0.0.0.1.0.1.0.0.0.0.0
CROSSREFS
Sequence in context: A147037 A146796 A146836 * A146860 A146185 A147399
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified July 19 13:29 EDT 2024. Contains 374394 sequences. (Running on oeis4.)