id:A146187 - 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 110-111-100 pattern in any orientation.

+0
1

1, 1, 1, 1, 9, 39, 227, 1199, 6097, 63869, 840409, 12862601, 284127507, 7552975051, 252656207179, 10547338792841 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.1.0.1.1.0` `.0.1.1.1.0.1.1.1` `.1.0.0.1.0.1.0.0` `.1.1.1.0.0.0.1.1` `.1.1.0.0.0.1.1.1` `.0.0.1.0.1.0.0.1` `.1.1.1.0.1.1.1.0` `.0.1.1.0.1.1.0.0`
	CROSSREFS	`Sequence in context: A124041 A126396 A075210 this_sequence A002085 A076603 A003354` `Adjacent sequences: A146184 A146185 A146186 this_sequence A146188 A146189 A146190`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 27 2008`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.