id:A147238 - 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 1101-0111-0001 pattern in any orientation.

+0
1

1, 1, 1, 1, 5, 21, 51, 289, 1391, 7677, 54075, 500683, 5608015, 82262213, 1433087781 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.1.0.1` `.0.0.0.0.1.0.1.1` `.0.0.0.1.1.0.1.0` `.0.0.0.1.0.1.1.1` `.1.1.1.0.1.0.0.0` `.0.1.0.1.1.0.0.0` `.1.1.0.1.0.0.0.0` `.1.0.1.1.1.0.0.0`
	CROSSREFS	`Sequence in context: A146721 A099979 A039659 this_sequence A147834 A160378 A096942` `Adjacent sequences: A147235 A147236 A147237 this_sequence A147239 A147240 A147241`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.