id:A145928 - 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 tee 1,1 1,2 1,3 2,2 in any orientation.

+0
1

1, 1, 1, 3, 10, 33, 134, 947, 8780, 97821, 1375312, 27712816, 754977953, 26645291289, 1208294585650, 74271003442168, 6124346294290730, 668846422203976047, 95426817845827533968, 18141398847837127162392 (list; graph; listen)

	OFFSET	`1,4`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.0.0.0.1` `.0.0.1.1.0.0.1.1` `.0.1.0.1.0.0.0.1` `.1.1.1.0.1.1.1.0` `.0.0.0.1.0.1.0.1` `.0.0.0.1.1.0.1.1` `.0.1.0.1.0.1.0.1` `.1.1.1.0.1.1.1.0`
	CROSSREFS	`Sequence in context: A149029 A149030 A149031 this_sequence A006535 A041633 A034215` `Adjacent sequences: A145925 A145926 A145927 this_sequence A145929 A145930 A145931`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 25 2008`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

AT&T Labs Research