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A147054
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1101-0111 pattern in any orientation.
0
1, 1, 1, 1, 1, 7, 21, 47, 193, 927, 6473, 56977, 532817, 5726035, 80429995, 1421425107, 32032166721, 887240799013, 28935423830217, 1147385224061533, 56743981461830039
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.1.1.1.0.0.0
.0.0.1.0.1.1.0.0
.1.1.0.0.1.0.1.0
.1.0.0.0.0.1.1.1
.1.1.1.0.0.0.0.1
.0.1.0.1.0.0.1.1
.0.0.1.1.0.1.0.0
.0.0.0.1.1.1.0.0
CROSSREFS
Sequence in context: A127736 A212677 A146802 * A146629 A195965 A137182
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved