id:A146066 - 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 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.

+0
1

1, 1, 1, 1, 3, 9, 19, 69, 389, 2287, 15081, 141721, 1694175, 23795099, 418616469, 9434924199, 264113682081, 9153093458787, 397472720900369, 21616544571284115, 1466493314737915869, 124160358455186794957 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.1.0.1.1.0` `.0.0.0.1.0.0.1.0` `.1.0.0.1.1.0.1.1` `.1.1.1.0.0.1.0.0` `.0.0.1.0.0.1.1.1` `.1.0.0.1.1.0.0.1` `.1.1.1.0.1.0.0.0` `.0.0.1.0.1.1.0.0`
	CROSSREFS	`Adjacent sequences: A146063 A146064 A146065 this_sequence A146067 A146068 A146069` `Sequence in context: A147070 A130586 A147146 this_sequence A164283 A033315 A073716`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 26 2008`

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Last modified November 8 20:39 EST 2009. Contains 166234 sequences.

AT&T Labs Research