id:A146681 - OEIS Search Results

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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-1100 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 9, 21, 93, 334, 1347, 5976, 45869, 290540, 3087921, 28902351, 440901387, 5686714599 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.0.0.0` `.0.1.0.0.1.1.1.0` `.0.1.0.1.1.0.0.0` `.1.1.1.0.0.1.0.1` `.1.0.1.0.0.1.1.1` `.0.0.0.1.1.0.1.0` `.0.1.1.1.0.0.1.0` `.0.0.0.1.1.0.0.0`
	CROSSREFS	`Sequence in context: A075640 A147480 A146396 this_sequence A050860 A154528 A130861` `Adjacent sequences: A146678 A146679 A146680 this_sequence A146682 A146683 A146684`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.