id:A147026 - 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 01000-11111-01000 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 9, 17, 35, 145, 589, 2723, 16121, 110705, 888953, 8435682, 98480917, 1294018001, 21003172843 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.0.0.1.0.0.0` `.0.1.0.1.1.1.1.1` `.0.1.0.0.1.0.0.0` `.1.1.1.0.0.0.1.0` `.0.1.0.0.0.1.1.1` `.0.0.0.1.0.0.1.0` `.1.1.1.1.1.0.1.0` `.0.0.0.1.0.0.1.0`
	CROSSREFS	`Sequence in context: A146236 A147279 A097478 this_sequence A055393 A147082 A145941` `Adjacent sequences: A147023 A147024 A147025 this_sequence A147027 A147028 A147029`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.