id:A145969 - 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 one by five or five by one block.

+0
1

1, 1, 1, 1, 1, 1, 2, 1, 3, 1, 6, 1, 15, 3, 43, 8, 140, 27, 656, 89, 3196, 333, 18641, 1310, 125685, 7293, 1010276, 48975, 9527791, 401989 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 9 X 9 example` `.0.0.0.0.0.0.0.0.0` `.0.0.1.1.1.1.1.0.0` `.0.1.0.0.0.0.0.1.0` `.0.1.0.0.0.0.0.1.0` `.0.1.0.0.0.0.0.1.0` `.0.1.0.0.0.0.0.1.0` `.0.1.0.0.0.0.0.1.0` `.0.0.1.1.1.1.1.0.0` `.0.0.0.0.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A084419 A119606 A034850 this_sequence A140352 A082588 A034869` `Adjacent sequences: A145966 A145967 A145968 this_sequence A145970 A145971 A145972`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 25 2008`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

AT&T Labs Research