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A147350
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01010-11111-00100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 3, 5, 11, 17, 27, 45, 160, 433, 1641, 4369, 14054, 40457, 191997, 778779, 4556420, 20430987, 121470430, 600262553
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.1.0.0.0.0
.0.0.1.1.1.1.1.0.0
.0.1.0.1.0.1.0.1.0
.0.1.1.0.0.0.1.1.0
.1.1.0.0.0.0.0.1.1
.0.1.1.0.0.0.1.1.0
.0.1.0.1.0.1.0.1.0
.0.0.1.1.1.1.1.0.0
.0.0.0.0.1.0.0.0.0
CROSSREFS
Sequence in context: A371165 A286264 A347027 * A066692 A123533 A144105
KEYWORD
nonn
AUTHOR
STATUS
approved