id:A147018 - 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 01000-11111-00010 pattern in any orientation.

+0
1

1, 1, 1, 1, 5, 9, 21, 35, 177, 589, 4235, 15969, 164553, 879607, 12456629, 97189937, 1947709409, 20669429409 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.0.0.0.0.1.0` `.1.1.0.1.1.1.1.1` `.0.1.0.0.1.0.0.0` `.0.1.1.0.0.0.1.0` `.0.1.0.0.0.1.1.0` `.0.0.0.1.0.0.1.0` `.1.1.1.1.1.0.1.1` `.0.1.0.0.0.0.1.0`
	CROSSREFS	`Sequence in context: A146867 A068481 A146827 this_sequence A081883 A049744 A000323` `Adjacent sequences: A147015 A147016 A147017 this_sequence A147019 A147020 A147021`
	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.