id:A147009 - OEIS Search Results

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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 00100-11111-00100 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 3, 6, 13, 20, 35, 74, 191, 479, 1455, 4033, 12735, 40335, 153380, 583871 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.0.0.0.1.0` `.1.1.1.1.1.0.1.0` `.0.0.1.0.0.1.1.1` `.0.1.0.0.0.0.1.0` `.0.1.0.0.0.0.1.0` `.1.1.1.0.0.1.0.0` `.0.1.0.1.1.1.1.1` `.0.1.0.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A080554 A064349 A101965 this_sequence A064290 A064621 A047172` `Adjacent sequences: A147006 A147007 A147008 this_sequence A147010 A147011 A147012`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.