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A146805
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0110-1100-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 3, 15, 43, 67, 129, 405, 1595, 5363, 29827, 122435, 735349, 3608129, 24333239, 151164887, 1326517337
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.0.1.1.0
.1.1.1.0.0.0.1.1
.1.0.1.0.1.1.1.0
.0.0.1.0.0.0.0.0
.0.0.0.0.0.1.0.0
.0.1.1.1.0.1.0.1
.1.1.0.0.0.1.1.1
.0.1.1.0.0.0.1.0
CROSSREFS
Sequence in context: A093627 A192060 A316642 * A147057 A330322 A101165
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved