id:A146649 - 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 1010-1111-1000 pattern in any orientation.

+0
1

1, 1, 1, 1, 5, 25, 55, 257, 1343, 7017, 52361, 533979, 5651335, 90178433, 1487870527, 34319557235, 869941319597 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.1.1.0.1.1.1` `.0.0.1.0.0.0.1.0` `.0.0.1.1.0.0.1.1` `.0.0.1.0.0.0.1.0` `.0.1.0.0.0.1.0.0` `.1.1.0.0.1.1.0.0` `.0.1.0.0.0.1.0.0` `.1.1.1.0.1.1.1.0`
	CROSSREFS	`Sequence in context: A044082 A161143 A045576 this_sequence A146412 A152734 A080856` `Adjacent sequences: A146646 A146647 A146648 this_sequence A146650 A146651 A146652`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.