id:A146928 - OEIS Search Results

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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1001-1111-1001 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 3, 7, 13, 26, 70, 233, 869, 3436, 14680, 71757, 413520, 2721699, 19996282, 163378650, 1508376980, 15870814986, 189905190363, 2566140210269, 39033535389467, 670295254576489, 13033170011033515, 287051699463343610 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.0.0.0` `.0.0.0.0.1.0.0.1` `.0.0.0.0.1.1.1.1` `.0.0.0.0.1.0.0.1` `.0.1.1.1.0.0.0.0` `.0.0.1.0.0.0.0.0` `.0.0.1.0.0.0.0.0` `.0.1.1.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A007909 A099810 A125898 this_sequence A068673 A140465 A080241` `Adjacent sequences: A146925 A146926 A146927 this_sequence A146929 A146930 A146931`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

AT&T Labs Research