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A146407
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1111-0100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 53, 53, 413, 413, 6475, 6475, 139711, 139711, 4765521, 4765521, 251545591, 251545591, 21612521501
OFFSET
1,9
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.0.0.0.0.0
.0.0.0.1.0.1.0.0.0
.1.1.1.1.0.1.1.1.1
.0.0.1.0.0.0.1.0.0
.0.0.0.0.0.0.0.0.0
.0.0.1.0.0.0.1.0.0
.1.1.1.1.0.1.1.1.1
.0.0.0.1.0.1.0.0.0
.0.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A146849 A146716 A146399 * A146684 A146652 A147133
KEYWORD
nonn
AUTHOR
STATUS
approved