id:A147025 - 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 01000-11111-01000 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 3, 15, 21, 45, 77, 273, 569, 2606, 6661, 31883, 89951, 535540, 1839325, 13532589, 55467031, 467306429, 2229430591, 22257836225 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.0.0.1.0` `.1.1.1.1.1.0.1.0` `.0.0.0.1.0.0.1.0` `.0.1.0.0.0.1.1.1` `.1.1.1.0.0.0.1.0` `.0.1.0.0.1.0.0.0` `.0.1.0.1.1.1.1.1` `.0.1.0.0.1.0.0.0`
	CROSSREFS	`Sequence in context: A129966 A110172 A014493 this_sequence A147017 A076825 A118565` `Adjacent sequences: A147022 A147023 A147024 this_sequence A147026 A147027 A147028`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 1 13:27 EST 2009. Contains 167806 sequences.

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