id:A146665 - 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 1100-0111-0001 pattern in any orientation.

+0
1

1, 1, 1, 1, 5, 25, 67, 401, 2363, 17629, 144263, 1829205, 25576287, 554261927, 12075864101 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.1.0.0.1.1` `.1.1.1.0.1.1.1.0` `.1.0.0.0.1.0.0.1` `.0.0.1.1.0.1.1.1` `.1.1.1.0.1.1.0.0` `.1.0.0.1.0.0.0.1` `.0.1.1.1.0.1.1.1` `.1.1.0.0.1.1.0.0`
	CROSSREFS	`Sequence in context: A071383 A088959 A018782 this_sequence A059302 A147130 A154286` `Adjacent sequences: A146662 A146663 A146664 this_sequence A146666 A146667 A146668`
	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.