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A147435
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111-0101 pattern in any orientation.
+0
1
1, 1, 1, 1, 1, 13, 21, 57, 259, 1017, 4255, 25913, 160493, 1488777, 11698881, 154711435, 1737788683, 30091739925
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
AT&T Labs Research
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