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A147061
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01010-11111 pattern in any orientation.
0
1, 1, 1, 1, 5, 1, 10, 1, 26, 1, 220, 25, 1716, 153, 23943, 1076, 485243, 13889, 10665112, 185108, 364094762, 4253039, 18497655767, 156271576, 1302420306077, 7383352471
OFFSET
1,5
EXAMPLE
Maximal 9 X 9 example
.0.0.1.1.1.1.1.0.0
.0.0.0.1.0.1.0.0.0
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.0.0.1.0.0.0.1.0.0
.0.0.0.1.0.1.0.0.0
.0.0.1.1.1.1.1.0.0
CROSSREFS
Sequence in context: A329373 A147362 A147225 * A147386 A145759 A131414
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved