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A147103
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation.
0
1, 1, 1, 1, 3, 3, 7, 7, 33, 45, 155, 235, 1041, 1865, 10449, 21963, 145411, 358505, 2858721, 8246787, 73843755, 250514431, 2686708159, 10696190873, 134925870103, 635649150983, 9570082275351
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.1.1.1.0.0
.0.0.0.0.0.1.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.1.0.0.0.0.0
.0.0.1.1.1.0.0.0
.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A107222 A050613 A145940 * A003133 A021300 A121527
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved