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A147265 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 5, 13, 25, 47, 157, 479, 1191, 4193, 22021, 114523, 544473, 2865365, 19090211, 131534115 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.0.1.0.0
.0.0.0.0.1.1.1.0.0
.0.0.0.1.1.0.0.1.1
.0.0.1.0.1.0.0.1.0
.0.1.1.1.0.1.1.1.0
.0.1.0.0.1.0.1.0.0
.1.1.0.0.1.1.0.0.0
.0.0.1.1.1.0.0.0.0
.0.0.1.0.0.0.0.0.0
CROSSREFS
Sequence in context: A146260 A147166 A146192 * A272705 A147272 A147427
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified February 23 09:42 EST 2024. Contains 370276 sequences. (Running on oeis4.)