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A145967
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a one by five or five by one block.
0
1, 1, 1, 1, 1, 3, 8, 27, 89, 333, 1310, 7293, 48975, 401989, 3756663, 40465266, 497724568, 7379658407, 131602632698, 2820564955461, 71452077409468, 2129247440397929, 74391175132817461, 3073387865714226226
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.1.1.1.1.1.0
.0.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.1.0.0.0.0.0.1
.0.0.1.1.1.1.1.0
CROSSREFS
Sequence in context: A210680 A121650 A151462 * A145792 A148834 A148835
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 25 2008
STATUS
approved