id:A146059 - OEIS Search Results

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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 2X3 U in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 3, 1, 5, 1, 11, 5, 41, 13, 189, 31, 927, 133, 5603, 759, 45359, 5033, 469791, 38887, 5816617, 382421, 90000163, 4832387, 1751237935, 75700651 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 9 X 9 example` `.0.0.0.0.0.0.0.0.0` `.0.0.0.1.0.1.0.0.0` `.0.0.0.1.1.1.0.0.0` `.0.1.1.0.0.0.1.1.0` `.0.0.1.0.0.0.1.0.0` `.0.1.1.0.0.0.1.1.0` `.0.0.0.1.1.1.0.0.0` `.0.0.0.1.0.1.0.0.0` `.0.0.0.0.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A133730 A112031 A146285 this_sequence A046531 A160085 A147024` `Adjacent sequences: A146056 A146057 A146058 this_sequence A146060 A146061 A146062`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research