id:A146789 - OEIS Search Results

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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-1100-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 9, 15, 43, 69, 163, 581, 2209, 8241, 41447, 165505, 1023967, 5358635, 39185391, 257135019, 2265291735 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.1.0.0.0.1.1.1.1` `.1.0.0.0.1.1.0.0` `.1.1.1.0.0.1.0.0` `.1.1.0.0.0.0.0.0` `.0.0.0.0.0.0.1.1` `.0.0.1.0.0.1.1.1` `.0.0.1.1.0.0.0.1` `.1.1.1.1.0.0.0.1`
	CROSSREFS	`Sequence in context: A100556 A057478 A128687 this_sequence A020172 A020174 A020315` `Adjacent sequences: A146786 A146787 A146788 this_sequence A146790 A146791 A146792`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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