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A146664
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0111-0001 pattern in any orientation.
+0
1
1, 1, 1, 1, 1, 1, 3, 19, 43, 87, 303, 1077, 3757, 15681, 80673, 475263, 2975253, 20229343, 160250909, 1366441107, 13345035623
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.
AT&T Labs Research
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