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A147205 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-0101-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 5, 13, 25, 41, 107, 335, 953, 3255, 14559, 66659, 322289, 1582731, 8865325, 55810029 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.1.1.0.0
.0.0.0.1.0.1.0.0.0
.0.0.0.1.1.1.0.0.1
.0.1.1.0.0.0.1.1.1
.0.0.1.0.0.0.1.0.0
.1.1.1.0.0.0.1.1.0
.1.0.0.1.1.1.0.0.0
.0.0.0.1.0.1.0.0.0
.0.0.1.1.0.0.0.0.0
CROSSREFS
Sequence in context: A268525 A146590 A098483 * A146875 A241233 A064276
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified March 29 05:16 EDT 2024. Contains 371264 sequences. (Running on oeis4.)