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A147364
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01110-11111 pattern in any orientation.
+0
1
1, 1, 1, 1, 1, 1, 2, 3, 6, 9, 16, 23, 72, 173, 621, 1620, 5393, 14347, 63207, 232978, 1333190, 5780677, 34593611, 163090674, 1165840626, 6871746297
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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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