id:A146878 - 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 1110-0100-0111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 9, 41, 249, 1137, 4177, 27849, 254297, 2360945, 31718257, 561884345, 12949529033, 316511614977 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.1.0.0` `.1.1.1.0.0.1.1.1` `.0.1.0.0.0.1.0.1` `.0.1.1.1.0.0.0.1` `.1.0.0.0.1.1.1.0` `.1.0.1.0.0.0.1.0` `.1.1.1.0.0.1.1.1` `.0.0.1.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A083085 A147283 A129793 this_sequence A050635 A065792 A118546` `Adjacent sequences: A146875 A146876 A146877 this_sequence A146879 A146880 A146881`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.