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A146430
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 101-111-101 pattern in any orientation.
0
1, 1, 3, 1, 7, 1, 37, 25, 437, 223, 16431, 2029, 527367, 30275, 25330876, 3302117, 3127296780, 405040667, 935559062214, 47290059763, 368226978458546, 9353389652113, 210092690735675833, 6107485984014353, 249527416442744315305
OFFSET
1,3
EXAMPLE
Maximal 8 X 8 example
.1.1.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.1.0.1.0.0.1.0.1
CROSSREFS
Sequence in context: A278954 A350802 A331884 * A146281 A146265 A146217
KEYWORD
nonn
AUTHOR
STATUS
approved