id:A147227 - OEIS Search Results

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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 11011-01110 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 2, 3, 6, 9, 16, 23, 72, 177, 631, 1684, 5696, 15819, 69884, 263612, 1492069, 6667995, 40872228, 203062570, 1480955534, 9070964673, 81908729534 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.1.0.1.1.0` `.0.0.0.1.1.1.0.1` `.1.0.0.0.0.0.1.1` `.1.1.0.0.0.0.1.0` `.0.1.0.0.0.0.1.1` `.1.1.0.0.0.0.0.1` `.1.0.1.1.1.0.0.0` `.0.1.1.0.1.1.0.0`
	CROSSREFS	`Sequence in context: A115995 A051057 A147364 this_sequence A147063 A007865 A052812` `Adjacent sequences: A147224 A147225 A147226 this_sequence A147228 A147229 A147230`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research