id:A146476 - 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 1110-0111 pattern in any orientation.

+0
1

1, 1, 1, 5, 9, 21, 67, 487, 1541, 16797, 92947, 1357947, 11628507, 269865307, 3412847085, 120253566545 (list; graph; listen)

	OFFSET	`1,4`
	EXAMPLE	`Maximal 8 X 8 example` `.1.1.1.0.1.1.1.0` `.0.1.1.1.0.1.1.1` `.0.0.0.0.0.0.0.0` `.0.1.1.1.0.1.1.1` `.1.1.1.0.1.1.1.0` `.0.0.0.0.0.0.0.0` `.1.1.1.0.1.1.1.0` `.0.1.1.1.0.1.1.1`
	CROSSREFS	`Sequence in context: A050559 A082676 A146932 this_sequence A110200 A063404 A102177` `Adjacent sequences: A146473 A146474 A146475 this_sequence A146477 A146478 A146479`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.