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A147511
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11110-01111 pattern in any orientation.
+0
1
1, 1, 1, 1, 1, 1, 1, 9, 15, 29, 57, 137, 413, 1389, 4485, 15371, 54209, 224739, 1032991, 5497929, 29140255, 171761393, 1058704295, 7315438183
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
AT&T Labs Research
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