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A146422
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1010-1111 pattern in any orientation.
0
1, 1, 1, 1, 9, 13, 35, 63, 2283, 5585, 180293, 562375, 23209995, 88508965, 13019468881, 63861201843, 14755196146889, 90930193025577, 44655947502046605, 347179958945954717
OFFSET
1,5
EXAMPLE
Maximal 8 X 8 example
.1.1.0.0.0.0.1.1
.1.0.0.0.0.0.0.1
.1.1.0.0.0.0.1.1
.1.0.0.0.0.0.0.1
.0.0.1.0.0.1.0.0
.0.1.1.0.0.1.1.0
.0.0.1.0.0.1.0.0
.0.1.1.0.0.1.1.0
CROSSREFS
Sequence in context: A287766 A146739 A146723 * A147352 A147391 A241677
KEYWORD
nonn
AUTHOR
STATUS
approved