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A146707
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-0100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 17, 21, 585, 1175, 13343, 33851, 942879, 2905569, 245036529, 956768823, 144790868423, 705471995975, 176283229110919, 1066729101305901, 506338112398505861, 3798966398967548935
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
CROSSREFS
Sequence in context: A146635 A146832 A146699 * A146643 A146715 A146848
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved