id:A146721 - 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 1100-1111-1000 pattern in any orientation.

+0
1

1, 1, 1, 1, 5, 21, 49, 265, 1337, 7025, 55305, 543439, 6271235, 94294061, 1709408045, 38060613237 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.1.1.0.1.1.1` `.0.1.1.0.0.0.1.1` `.0.0.1.0.0.0.1.0` `.0.0.1.0.0.0.1.0` `.0.1.0.0.0.1.0.0` `.0.1.0.0.0.1.0.0` `.1.1.0.0.0.1.1.0` `.1.1.1.0.1.1.1.0`
	CROSSREFS	`Sequence in context: A146846 A041825 A022268 this_sequence A099979 A039659 A147238` `Adjacent sequences: A146718 A146719 A146720 this_sequence A146722 A146723 A146724`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.